🇫🇷 Nice Climate Health Index
Friday, 7 August 2026 · updated 10:33 UTC · refreshes live through the day · LIVE
Modelled estimates · Medically reviewed guidance · Not an official warning service
est. = index derived by Mobi Doctor's model from the weather inputs. All values are modelled estimates from European weather and atmospheric forecast systems (Open-Meteo · CAMS/Copernicus) — not direct readings from a monitoring station in this city, and not official public-health warnings.
Cancer Immunology Researcher
The Climate Health Score for Nice today is 10.0/10 — extreme exposure on a 0–10 scale where 10 is extreme. It reflects the worst of ten live hazard readings for Nice — heat, UV, air quality, pollen, hydration demand, allergy, mosquito activity, fire weather, flu season and cold — and is recalculated through the day by Mobi Doctor's European Climate Health Index.
How heat behaves in Nice
Nice combines Riviera humidity with a sea warm enough to sustain long tropical-night runs — and one of France's oldest urban populations. Warm nights plus concentrated cardiovascular vulnerability is the specific local equation.
Nice stacks against the Alps' last slopes facing a sea that no longer cools it by August: the Baie des Anges holds some of France's warmest coastal water, and the dense seafront districts — where much of the city's notably old population lives — get humid nights the hill districts escape. The Promenade's famous exposure is real: a seven-kilometre south-facing arc with the shade all on one side of the road.
Heat and your health in Nice today
Feels-like maximum 38°C (air temperature 32°C) · tonight's minimum 26°C · humidity 70% · heat pillar score 10.0/10
Where today sits in Nice's year: the heat season here typically runs June to late September, humid Riviera heat, peaking mid-July to late August. Tropical nights in Nice: among France's most persistent — common from July to mid-September on the seafront.
Heat stresses the body long before heatstroke. As the air temperature and humidity climb, your heart works harder to push blood to the skin for cooling, you lose fluid and electrolytes through sweat, and blood pressure can dip when you stand. That is why hot days bring more dizziness, fainting, migraines, kidney strain and falls — and studies of heatwave hospital admissions also report more urinary tract infections, thought to be linked to dehydration — not just classic heat exhaustion.
Night temperature matters as much as the daytime peak. When a night stays above 20°C — a tropical night — the cardiovascular system gets far less of its overnight recovery window — one reason heatwave mortality tracks hot nights more closely than hot afternoons. Tonight in Nice is forecast to stay around 26°C, so prioritise cooling the bedroom before you sleep.
Pollen count in Nice today
Leading species: Grass at ~3 grains/m³ · pollen score 1.2/10
Nice's pollen calendar: Cypress February–March · parietaria spring to autumn · grass April–June · olive May–June. The live counts above show where today falls in that cycle.
Pollen allergy (hay fever) is triggered by different plants through the year: trees like birch and alder in spring, grasses in early summer, and weeds such as mugwort and ragweed from late July into autumn. Symptoms — sneezing, itchy eyes, a blocked nose, worsened asthma — flare when daily counts cross species-specific thresholds, and air pollution makes the same pollen load feel worse by priming the airways.
On high-count days: keep windows closed in the early morning and evening, shower and change after time outdoors, and start antihistamines before symptoms peak rather than after. If you use an asthma inhaler, keep it with you on high pollen days.
Allergy load in Nice today: pollen × air quality
Combined pollen-and-air allergy load 2.2/10 — pollen 1.2 amplified by air quality (EAQI 56) · estimated from live data
Nice runs cypress and olive springs — the Riviera's ornamental and agricultural signatures — against traffic squeezed along the coastal shelf between mountains and sea. Parietaria persists nearly year-round on warm stone; sea breezes moderate what stagnation would amplify.
Allergy risk is more than the pollen count. Exhaust particles damage the airway lining and prime the immune response, so the same grains provoke stronger symptoms on polluted days — and pollutant-stressed plants release more allergenic protein per grain. This combined score therefore reads pollen and air quality together: identical counts can feel very different on clean and dirty days, which is why it is tracked as its own pillar rather than folded into either input.
Today the combination is modest — sensitised people can treat this as a normal day, with the usual seasonal routine.
UV index in Nice today
Maximum UV index 7.0 · high on the WHO scale
Nice's strong-UV season: April to September — midday index 8–9.
UV radiation peaks between late morning and mid-afternoon and is invisible — it burns on cool, cloudy days too. At UV 8 and above, unprotected fair skin can burn in under 30 minutes. Repeated burns drive most skin-cancer risk, and some common medicines (certain antibiotics, diuretics, acne treatments) make skin dramatically more sun-sensitive.
Today: SPF 30–50 on exposed skin, sunglasses, and shade between 11:00 and 16:00. Reapply sunscreen every two hours outdoors.
Air quality in Nice today
European AQI 56 · moderate (EAQI scale: 0 good → 100+ worst) · PM2.5 12.4 µg/m³ · ozone 124 µg/m³ · score 5.1/10
Nice's corniche traffic sets the local baseline and the sea usually disperses it; hot still days build ozone against the Alpine wall behind the city, and occasional dust crossings from Africa add haze to the bluest coast.
Fine particles (PM2.5) reach deep into the lungs and bloodstream; ozone forms in sunny, hot weather and irritates the airways — which is why heatwaves and smog often arrive together. People with asthma, COPD, heart disease, pregnant women and children feel the effects first: more wheeze, more inhaler use, more chest tightness.
Today: sensitive groups should limit prolonged outdoor exertion, keep reliever inhalers to hand, and prefer mornings for exercise when ozone is lowest.
Fire weather around Nice today
Fire-weather score 1.5/10 — 32°C, 70% humidity, wind to 12 km/h · estimated (weather conduciveness, not active fires)
The Maures and Esterel massifs west of Nice, and the dry pre-Alpine hills behind, burn regularly — the Var's 2021 fire smoked the coast — and mistral-dried August days push readiness to its peak. The score reads that regional tinder-state.
This pillar scores how conducive the weather is to wildfire — heat, dry air and wind, the published Angström approach — not actual fires. Its health meaning is smoke: wildfire smoke is concentrated fine particulate that can travel hundreds of kilometres, and a smoke episode hits the same people hardest as any pollution spike — asthma, COPD, heart disease, pregnancy, young children and older adults.
Conditions are not notably fire-conducive today. If you see or smell smoke regardless, treat it like a pollution episode: head indoors, close the windows, and postpone outdoor exertion.
Hydration in Nice today
Hydration demand score 7.5/10 · estimated from live weather
Nice's humid seafront keeps losses steady and the warm nights extend them: the promenade-and-beach day is a long, low-grade drain, and the city's older population runs the weakest thirst signals — scheduled drinking beats waiting for the cue.
Fluid needs are not fixed — they scale with heat, humidity, dry air, UV and activity. Thirst lags behind need, especially in older adults, whose thirst signal weakens with age. Dark urine, headache, and light-headedness on standing are earlier and more reliable signals.
Today's guidance: High demand — small amounts often, before you feel thirsty; add electrolytes if sweating heavily; needs rise further with activity, sun exposure and body size. (If your doctor has restricted your fluids — heart or kidney conditions — keep to their limit and ask before increasing.)
Mosquito activity in Nice tonight
Mosquito activity score 6.0/10 — tonight around 26°C at 70% humidity · estimated from live weather (activity, not disease risk)
Mosquito season in Nice: May to October — the tiger mosquito's original French beachhead; dusk discipline essential. The score above places tonight inside that season using live temperature and humidity.
Mosquitoes fly when nights are warm and humid enough — activity climbs steeply once evenings hold above about 15°C and peaks on still, muggy nights. Southern Europe adds the tiger mosquito, a day-biter now established across much of the Mediterranean, whose continued spread north ECDC tracks. In parts of southern and central Europe, late summer also brings limited local transmission of mosquito-borne infections such as West Nile virus — an activity score is not a disease-risk score, but high-activity weeks are when precautions earn their keep.
Practical: use a repellent containing DEET or icaridin at dusk, cover ankles and wrists outdoors in the evening, screen or close windows at night, and empty standing water on balconies weekly. Speak to a doctor about any fever that develops in the week after heavy bite exposure in an affected region.
Flu season in Nice: where today sits
Flu-season level 0.5/10 · seasonal climatology (ECDC winter pattern), not live case counts
Flu on the Riviera runs December to February, peaking in January among one of Europe's most concentrated retirement populations — exactly who the autumn vaccination campaign exists for. Summer sits at the floor; winter visitors add the usual mixing.
Influenza in Europe is sharply seasonal: transmission runs low through summer, builds from late autumn as life moves indoors and cool, dry air favours the virus, then peaks between December and February in ECDC's surveillance pattern. This pillar follows that climatology — it tells you where the calendar sits, not this week's case counts, and we label it that way rather than dress a seasonal curve up as live surveillance.
What to do with it: the score rising through autumn is the cue that vaccination time has arrived — October to November gives antibodies time to build before the peak, and matters most for over-65s, pregnant women, young children and anyone with heart, lung, kidney or immune conditions. At today's low seasonal level, a summer fever is far more likely to be something other than flu — and worth a doctor's opinion if it lasts.
Cold stress in Nice: the other end of the index
Cold-stress score 0.0/10 — tonight's minimum around 26°C
Nice winters are the mild Riviera cliché with sharp exceptions: sunny 13°C days, frost rare on the coast, snow on the Mercantour an hour behind. Cold stress concentrates in wind-chill episodes and unheated older housing during rain spells; the pillar stays low.
Across Europe, cold claims more lives each year than heat — mostly quietly, through winter's extra heart attacks, strokes and respiratory infections rather than hypothermia. Cold air raises blood pressure and thickens blood within minutes, narrows airways, and stresses hearts hardest in the first snaps of the season, before bodies and habits adjust. Indoor cold in poorly heated homes does as much damage as the weather outside.
Cold is not a factor today — the score sits low, and this pillar will matter again when the season turns. It stays on the page year-round because an honest index needs both ends of the thermometer.
The Nice climate-health year
The Niçois year is the Riviera's: a mild, bright winter that made the city's name, a spring pollen season of cypress, parietaria, grass and olive, and a long humid summer from June to September in which the sea's warmth turns the coast into a tropical-night machine — weeks can pass without the seafront dropping below 23°C. Autumn brings the Mediterranean's violent rain episodes. The defining medical fact is the night heat on an old population: recovery hours that never come.
| Season | Typical pattern in Nice |
|---|---|
| Heat season | June to late September, humid Riviera heat |
| Peak heat | mid-July to late August |
| Tropical nights | Among France's most persistent — common from July to mid-September on the seafront |
| Pollen calendar | Cypress February–March · parietaria spring to autumn · grass April–June · olive May–June |
| Mosquito season | May to October — the tiger mosquito's original French beachhead; dusk discipline essential |
| Strong-UV months | April to September — midday index 8–9 |
Typical seasonal patterns from established climatology — the live scores above always reflect today's actual conditions.
Visiting Nice? What travellers should know
Nice's hazards hide in pleasantness: the Promenade at 11:00 is full sun off water and pale pavement — walk it before 10:00 or after 18:00 and take the old town's shaded lanes between. The Castle Hill climb is short but exposed; the lift exists. Beach pebbles reach burn temperatures by afternoon (sandals to the waterline), and the sea's warmth invites the long swims that pair badly with lunch wine in 32°C humidity. Sleep is the real challenge: in August, ask for air conditioning, not a sea view, if you must choose.
If you do get ill away from home, you don't have to navigate a foreign health system for something a consultation can solve: speak to a Mobi Doctor physician online from your hotel or apartment.
Medicines that need extra care in Nice at 32°C
Most medicines are licensed for storage below 25°C; several everyday ones degrade fast beyond that — and a parked car at 32°C outside reaches roughly 48°C inside within half an hour. Today crosses those thresholds, so the following deserve attention.
Insulin all types & pens
Storage: Unopened: fridge 2–8 °C, never frozen. In-use pens: up to 28 days below 30 °C, away from sun.
In this heat: Heat above the labelled range can damage insulin, and warm weather can speed absorption from the injection site in some people, raising hypo risk — check glucose more often and follow the storage instructions for your specific product.
Hot car: A parked car can exceed 50 °C — insulin left inside should be replaced. Appearance is not a reliable damage test (some insulins are normally clear, some normally cloudy): if in doubt, ask a pharmacist.
GLP-1 injections Ozempic · Wegovy · Mounjaro
Storage: Unopened: fridge 2–8 °C. In-use: below 30 °C for a limited window — typically 3–6 weeks, check your leaflet.
In this heat: Above 30 °C the peptide degrades; do not use if the solution has particles or colour.
Hot car: Left in a hot car once — assume compromised and call a pharmacist before injecting again.
Adrenaline auto-injectors EpiPen · Jext · Emerade
Storage: Room temperature 15–25 °C. Never refrigerate — cold can jam the mechanism.
In this heat: Heat degrades adrenaline; a weakened pen may fail during anaphylaxis — check the viewing window stays clear.
Hot car: Glovebox reaches 60 °C+. A pen exposed even once should be replaced promptly.
Testosterone gels · injections · patches
Storage: Below 25–30 °C depending on product; gels are alcohol-based and flammable.
In this heat: Heat degrades gels; skin patches release MORE hormone when hot — absorption shifts on hot days.
Hot car: Do not store in vehicles; vials and gels lose potency within days of heat cycling.
Refrigerated antibiotics & biologics reconstituted suspensions · adalimumab…
Storage: Strict 2–8 °C cold chain. Reconstituted antibiotic syrups usually last only 7–14 days even refrigerated.
In this heat: Warm exposure silently cuts potency — the course may fail without looking any different.
Hot car: Never. A pharmacy-to-fridge trip in a hot car already needs a cool bag.
Thyroid & hormone tablets levothyroxine · HRT
Storage: Below 25 °C, dry, in the original blister.
In this heat: Repeated heat cycling (bathroom, car, windowsill) degrades levothyroxine measurably.
Hot car: Days of car storage can leave tablets under-dosed.
Medicines that change how your body handles heat
- Diuretics — amplify fluid and electrolyte loss — dizziness and falls risk climbs in heat
- Blood-pressure medicines (ACE-i, ARBs, beta-blockers) — can affect fluid balance, blood pressure and heat responses in some people — never stop or change them in hot weather without medical advice
- Lithium — dehydration concentrates blood levels toward toxicity — hydration is critical
- Antipsychotics, anticholinergics, some antidepressants — impair sweating and temperature regulation
- Insulin & sulfonylureas — faster absorption and reduced appetite in heat raise hypo risk
- NSAIDs (ibuprofen, naproxen) — strain the kidneys when dehydrated
- Stimulants (ADHD medicines) — raise core temperature during exertion
Never stop a prescribed medicine because of hot weather — a doctor can adjust timing or dose. Mobi Doctor's physicians can advise online, usually within minutes.
Should I speak to a doctor about heat symptoms?
Heat illness escalates in stages, and the right response depends on which stage you're seeing. Use these three tiers — and on a day like today in Nice, when the heat pillar is high, err toward the more cautious tier:
ACall 112 now — emergency signs
- Confusion, slurred speech, or disorientation; a seizure; or fainting that doesn't resolve within a minute or two
- Skin that has turned hot and dry after earlier heavy sweating, or a body temperature of 40 °C or more — signs of heatstroke
- Chest pain, severe shortness of breath, or a racing pulse that doesn't settle with rest in the cool
- Heat-exhaustion symptoms — dizziness, headache, nausea, cramps, pale clammy skin — that are no better after 30 minutes of rest, cooling and fluids: this can be heatstroke developing
- A baby, elderly person, or someone with heart disease who becomes limp, unresponsive, or "not themselves" in the heat
While waiting: move them to the coolest place available, remove excess clothing, cool the skin with water and moving air, and do not give fluids to anyone who is drowsy or confused.
BSpeak to a doctor today
- Heat symptoms that improve with cooling but keep returning on hot days, or leave you washed out for more than a day
- Repeated vomiting, or very dark urine / almost no urination through the day
- You take diuretics, blood-pressure, heart, or diabetes medication and feel unwell in the heat — some of these medicines change how your body handles fluid and temperature
- You are pregnant, or you have a heart or kidney condition that feels worse than usual in this weather
CSelf-care and recheck in 30 minutes
- Mild headache, tiredness, or thirst: move somewhere cool, remove unnecessary clothing, drink plenty of water or an isotonic sports drink, and cool the skin — spray or sponge with cool water and fan
- Recheck at 30 minutes. Improving means continue resting out of the heat for the rest of the day. Not improving is an emergency — call 112 (tier A), not a wait-and-see
Local numbers in France: 112 — EU-wide emergencies · 15 — SAMU · for non-urgent concerns, a Mobi Doctor physician is online in minutes.
General guidance, not a personal assessment — when in doubt, call. In an emergency always call 112.
Sources for the medical guidance
The clinical guidance on this page follows public authority sources:
Medication storage limits follow each product's manufacturer information (SmPC / patient leaflet) — always defer to the leaflet for your specific product, and to your prescriber for personal advice.
Frequently asked questions
Is it safe to exercise outdoors in Nice today?
Outdoor exertion is not advisable today — the heat pillar is at 10.0/10. If you must train, the least-bad window is tomorrow 06:00–08:00 — feels like ~29°. Indoor, cooled exercise is the safer choice.
Do I need to worry about storing insulin or Ozempic in Nice this week?
Yes. Daytime highs around 32°C exceed the below-30°C limit for in-use pens if they are left in sun, bags or vehicles. Keep unopened stock in the fridge (2–8°C), carry in-use pens in an insulated pouch, and never leave them in a parked car.
Who is most at risk from today's conditions in Nice?
Today's Climate Health Score is 10.0/10 (Extreme). Elderly: extreme · Children: extreme · Outdoor workers: extreme · Athletes: extreme. Driven by feels-like 38° heat, a 26° tropical night and evening mosquito activity.
Will tonight be a tropical night in Nice?
Yes — the minimum stays around 26°C (a tropical night is one that never drops below 20°C). Cool the bedroom before sleep, use light bedding and hydrate before bed; hot nights are when heat strain accumulates.
When is the heat season in Nice?
Typically June to late September, humid Riviera heat, peaking mid-July to late August. Among France's most persistent — common from July to mid-September on the seafront. Today's score at the top of this page reflects live conditions, not the seasonal average.
When is pollen season in Nice?
Cypress February–March · parietaria spring to autumn · grass April–June · olive May–June. This page tracks live counts for six species (alder, birch, grass, mugwort, olive and ragweed) and updates them through the day.
When is mosquito season in Nice?
May to October — the tiger mosquito's original French beachhead; dusk discipline essential. The live mosquito-activity score on this page places tonight inside that season using temperature and humidity — it measures activity conditions, not disease risk.
Highest-risk cities in Europe today
All cities:
Nice score history — last 30 days
One point per day, refreshed by the daily rebuild. Full archive downloads in the press room.
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