Weather in Nantes - 14-day forecast

Detailed weather forecast for Nantes, France: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Nantes

today☁️ 25°💧 2.1 mm

Sun☁️ 32°💧 0.1 mm

Mon☁️ 26°💧 4.4 mm

Tue🌧️ 16°💧 0.9 mm

Wed☀️ 22°💧 0.9 mm

Thu☁️ 21°💧 0.7 mm

Fri🌧️ 23°💧 0.7 mm

Sat🌤️ 25°💧 0.3 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Sunday 6 Sept in Nantes, the forecast high is 32°C. Typical daytime temperatures at this time of year range from 20°C to 26°C, so it will be exceptionally warm. It is warmer than 99% of similar days.

Saturday 5 Sept

25°Cwarmer than usual

usually 21°C–26°C

warmer than 75% of similar days

night: exceptionally warm rain: more rain than usual wind: lighter than usual

Sunday 6 Sept

32°Cexceptionally warm

usually 20°C–26°C

warmer than 99% of similar days

night: exceptionally warm rain: typical rainfall wind: typical

Monday 7 Sept

26°Cwarmer than usual

usually 20°C–26°C

warmer than 85% of similar days

night: exceptionally warm rain: more rain than usual wind: stronger than usual

Tuesday 8 Sept

16°Cexceptionally cool

usually 20°C–26°C

cooler than 98% of similar days

night: warmer than usual rain: more rain than usual wind: typical

Wednesday 9 Sept

22°Cnear normal

usually 20°C–26°C

night: exceptionally warm rain: more rain than usual wind: typical

Thursday 10 Sept

21°Cnear normal

usually 20°C–26°C

night: exceptionally warm rain: typical rainfall wind: typical

Friday 11 Sept

23°Cnear normal

usually 20°C–25°C

night: exceptionally warm rain: typical rainfall wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 23°C by day. The coolest year was 1984 (19°C) and the warmest was 2023 (31°C). The current forecast averages 24°C - close to the historical median.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

Weather warnings - Nantes

No active weather warnings for Nantes (region: Loire Atlantique). The national weather service is not forecasting dangerous conditions.

14-day forecast - Nantes

Nantes - 14-day weather forecast infographic

Nantes 30 & 45-day weather - long-range outlook

Next 16 days · forecast

24°

around 18° at night · days with rain: 5

Weeks 3-4 · avg for September

22°

around 11° at night · rain chance 35%

Weeks 5-7 · avg for October

18°

around 9° at night · rain chance 48%

The 30 & 45-day outlook for Nantes: the next 16 days are a numerical forecast updated daily - on average 24° by day and 18° at night. Further out we rely on multi-year climate averages: around 22° in September, and about 18° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Nantes

Saturday5 September 2026

☁️25°broken clouds

sunrise 07:30 · sunset 20:39 · night 21° · evening 25° · rain 2.1 mm · humidity 28% · wind 4 m/s · clouds 69%

Sunday6 September 2026

☁️32°overcast clouds

sunrise 07:31 · sunset 20:37 · night 18° · evening 26° · rain 0.13 mm · humidity 26% · wind 6 m/s · clouds 85%

Monday7 September 2026

☁️26°broken clouds

sunrise 07:33 · sunset 20:35 · night 17° · evening 21° · rain 4.41 mm · humidity 47% · wind 7 m/s · clouds 58%

Tuesday8 September 2026

🌧️16°light rain

sunrise 07:34 · sunset 20:33 · night 15° · evening 18° · rain 0.91 mm · humidity 77% · wind 5 m/s · clouds 100%

Wednesday9 September 2026

☀️22°clear sky

sunrise 07:35 · sunset 20:31 · night 15° · evening 17° · rain 0.93 mm · humidity 38% · wind 7 m/s · clouds 7%

Thursday10 September 2026

☁️21°overcast clouds

sunrise 07:36 · sunset 20:29 · night 16° · evening 19° · rain 0.72 mm · humidity 59% · wind 6 m/s · clouds 90%

Friday11 September 2026

🌧️23°light rain

sunrise 07:38 · sunset 20:27 · night 16° · evening 23° · rain 0.66 mm · humidity 67% · wind 6 m/s · clouds 100%

Saturday12 September 2026

🌤️25°scattered clouds

sunrise 07:39 · sunset 20:25 · night 16° · evening 20° · rain 0.33 mm · humidity 45% · wind 6 m/s · clouds 32%

Sunday13 September 2026

🌧️18°moderate rain

sunrise 07:40 · sunset 20:23 · night 17° · evening 19° · rain 9.72 mm · humidity 93% · wind 5 m/s · clouds 100%

Monday14 September 2026

🌧️26°light rain

sunrise 07:42 · sunset 20:21 · night 19° · evening 23° · rain 0.36 mm · humidity 38% · wind 7 m/s · clouds 40%

Tuesday15 September 2026

🌧️21°light rain

sunrise 07:43 · sunset 20:19 · night 15° · evening 18° · rain 6.63 mm · humidity 74% · wind 6 m/s · clouds 76%

Wednesday16 September 2026

🌧️20°light rain

sunrise 07:44 · sunset 20:17 · night 16° · evening 19° · rain 0.99 mm · humidity 71% · wind 7 m/s · clouds 89%

Thursday17 September 2026

🌧️24°light rain

sunrise 07:46 · sunset 20:15 · night 20° · evening 20° · rain 0.33 mm · humidity 42% · wind 8 m/s · clouds 26%

Friday18 September 2026

☀️28°clear sky

sunrise 07:47 · sunset 20:13 · night 20° · evening 24° · humidity 44% · wind 6 m/s · clouds 6%

Saturday19 September 2026

🌤️28°a few clouds

sunrise 07:48 · sunset 20:11 · night 18° · evening 21° · humidity 42% · wind 7 m/s · clouds 17%

Sunday20 September 2026

🌧️25°moderate rain

sunrise 07:50 · sunset 20:09 · night 24° · evening 24° · rain 13.95 mm · humidity 58% · wind 5 m/s · clouds 85%

UV index in Nantes - is it safe to sunbathe?

Today the UV index in Nantes is 6 (moderate) - unprotected fair skin can burn in about 35 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Pollen in Nantes - info for allergy sufferers

Today grasses pollen is highest in Nantes - about 3 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

Air quality and smog in Nantes

Air quality in Nantes is currently very good. Fine particulate PM2.5: 3.9 µg/m³, PM10: 7.6 µg/m³.

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Nantes	3.9	7.6	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 03:00).

Nantes weather through the year

Warmest, driest months on average: April, May, June, July.

Upcoming public holidays in France: All Saints' Day — 1 November · Armistice Day — 11 November · Christmas Day — 25 December.

Nearby and related places

NiceMartiniqueParisMarseilleSt. MartinRéunion

FAQ - Nantes weather

What is the weather like in Nantes today?

Today it is about 25° during the day and 21° at night, broken clouds.

How far ahead can I check the forecast for Nantes?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.