Montesson

Yvelines, Île-de-France, France

Unlock Minute-by-Minute Forecast

See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.

Current Weather

22°

Overcast

Feels Like: 22°

Min: 13°

Max: 23°

The next few hours will be overcast, with today reaching 23°C and dropping to 11°C. The coming days will be mostly cloudy

Does this forecast seem accurate?

Unlock Historical Data

Compare today's weather with yesterday's data and track temperature trends over time.

Hourly Forecast

21° 22° 21° 20° 19° 17° 15° 14° 13° 13° 12° 12° 11° 11° 10° 10° 14° 16° 18° 20° 21° 22° 22°
5pm
6pm
7pm
8pm
9pm
10pm
11pm
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
Today
Tomorrow

Daylight Hours

07:43

Sunrise

19:45

Sunset

12 hours 1 minutes of sunlight today

Moon

Waxing Gibbous

17:25

Moonrise

01:14

Moonset

Daily Forecast

Today

13°
23°

Monday

22°

Tuesday

10°
25°

Wednesday

11°
25°

Thursday

11°
29°

Friday

13°
26°

Saturday

13°
22°

Sunday

14°
24°

Monday

16°
29°

Tuesday

16°
29°

Air Quality Data Available

Upgrade to access real-time air quality data for Montesson.

UV Index

No protection needed
1 Low
Low Extreme

Humidity

66% Comfortable
Low High

Current stargazing conditions?

See sky darkness, moon phase, and the best viewing window for Montesson.

View stargazing score

Weather in Montesson today, September 20, 2026

Expect a muted, overcast feel in Montesson on September 20, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief.

Expect highs of 23°C and cooler readings close to 13°C. Expect humidity between 61% and 72%, most humid near 23:00. Winds stay light, near 3.2 km/h by 18:00, so the day feels still more than breezy.

Expect persistent cloud later on, with amounts around 100% by 20:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 38.4 km on average, though it can drop toward 36.2 km in thicker cloud or showers. The sun rises at 07:43 and sets at 19:45, for a total of 12 hours 1 minutes of sunlight today.

The practical takeaway for Montesson on September 20, 2026 is a cloudy day that stays usable, just not particularly bright, around 23°C.

Frequently asked questions about weather in Montesson

How warm does it get in Montesson?

The warmest month in Montesson 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 Montesson?

The coldest month in Montesson 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 Montesson?

The wettest month in Montesson is October, with an average of 80mm of precipitation.

What is the driest time of year in Montesson?

The driest month in Montesson is July, with an average of 50mm of precipitation.

View full climate insights for Montesson →

Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)