See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Overcast
Feels Like: 21°
Min: 14°
Max: 22°
The next few hours will be mostly clear, with tomorrow reaching 23°C and dropping to 12°C. The coming days will be mostly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:42
Sunrise
19:44
Sunset
Moon
Waxing Gibbous
17:25
Moonrise
01:13
Moonset
Daily Forecast
Today
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Air Quality Data Available
Upgrade to access real-time air quality data for Ermont.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Ermont.
View stargazing scoreWeather in Ermont tomorrow, September 21, 2026
Cloud cover dominates in Ermont on September 21, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. Cloud leads the morning, peaking close to 100% near 05:00. Sunshine has little room until later in the day.
Temperatures climb from an overnight low near 11°C toward a daytime high of about 23°C. The air stays humid, with relative humidity between 37% and 96% and the peak around 08:00. Airflow remains manageable, reaching about 2.5 km/h around 18:00.
Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 28.8 km on average, though it can drop toward 8.0 km in thicker cloud or showers. Expect sunrise at 07:44, sunset at 19:42, and 11 hours 58 minutes of sunlight today overall.
Taken together, overcast skies in Ermont on September 21, 2026 favour indoor or covered options, with temperatures near 23°C.
Frequently asked questions about weather in Ermont
How warm does it get in Ermont?
The warmest month in Ermont is July, with average high temperatures of 25°C. The average temperature during this period is around 20°C.
How cold does it get in Ermont?
The coldest month in Ermont is January, with average low temperatures of 2°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Ermont?
The wettest month in Ermont is October, with an average of 80mm of precipitation.
What is the driest time of year in Ermont?
The driest month in Ermont is July, with an average of 50mm of precipitation.
Explore more weather forecasts
- Eaubonne, Île-de-France
- Paris, Île-de-France
- Franconville, Île-de-France
- Marseille, Provence-Alpes-Côte d'Azur
- Sannois, Île-de-France
- Lyon, Auvergne-Rhône-Alpes
- Saint-Gratien, Île-de-France
- Toulouse, Occitanie
- Saint-Leu-la-Forêt, Île-de-France
- Nice, Provence-Alpes-Côte d'Azur
- Soisy-sous-Montmorency, Île-de-France
- Nantes, Pays de la Loire
- Montigny-lès-Cormeilles, Île-de-France
- Marne La Vallée, Île-de-France
- Cormeilles-en-Parisis, Île-de-France
- Strasbourg, Grand Est
