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Val d'Oise (Cergy-Pontoise)
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Weather in Val d'Oise for September 2025

Your guide to Val d'Oise weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Val d'Oise is slightly cooler than the historical average by -1.8 °C.

  • The forecast for the next days in Val d'Oise predicts temperatures to be around 20 °C, close to the historical average.

  • In general, the average temperature in Val d'Oise at the beginning of September is 26 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.

    • Rain 🌧️

  • The climate of Val d'Oise in September is notably wet, with an average of 13 rainy days, and a total of 73.6 mm of precipitation.

    • More

  • Is September a good time to visit Val d'Oise? check out the best time to travel to Val d'Oise page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/14°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Val d'Oise Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
26°
2
Light rain shower
24°
3
Sunny
25°
4
Sunny
25°
5
Partly cloudy
25°
6
Sunny
27°
7
Sunny
30°
8
Sunny
26°
9
Sunny
25°
10
Partly cloudy
25°
11
Light rain shower
21°
12
Overcast
19°
13
Overcast
20°
14
Cloudy
21°
15
Partly cloudy
23°
16
Patchy rain possible
22°
17
Partly cloudy
25°
18
Sunny
28°
19
Sunny
32°
20
Moderate rain
24°
21
Moderate rain
21°
22
Patchy rain possible
20°
23
Patchy rain possible
16°
24
Patchy rain possible
16°
25
Partly cloudy
21°
26
Partly cloudy
18°
27
Partly cloudy
18°
28
Sunny
18°
29
Sunny
17°
30
Partly cloudy
17°

Temperatures trend during September in Val d'Oise

See the weather trend as well as the moving average line

September weather in Val d'Oise day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 26° /16° 3.5 mm 6
2 Sept. Light rain shower
Light rain shower
 24° /15° 0.8 mm 5
3 Sept. Sunny
Sunny
 25° /16° 0.5 mm 6
4 Sept. Sunny
Sunny
 25° /15° 0.5 mm 6
5 Sept. Partly cloudy
Partly cloudy
 25° /15° 5 mm 6
6 Sept. Sunny
Sunny
 27° /16° 0.1 mm 7
7 Sept. Sunny
Sunny
 30° /17° 1.7 mm 7
8 Sept. Sunny
Sunny
 26° /17° 5.7 mm 6
9 Sept. Sunny
Sunny
 25° /17° 0.3 mm 6
10 Sept. Partly cloudy
Partly cloudy
 25° /16° 0.6 mm 6
11 Sept. Light rain shower
Light rain shower
 21° /14° 1.5 mm 5
12 Sept. Overcast
Overcast
 19° /11° 0.2 mm 5
13 Sept. Overcast
Overcast
 20° /12° 2.7 mm 5
14 Sept. Cloudy
Cloudy
 21° /12° 0.2 mm 5
15 Sept. Partly cloudy
Partly cloudy
 23° /13° 0.2 mm 6
16 Sept. Patchy rain possible
Patchy rain possible
 22° /13° 0.1 mm 5
17 Sept. Partly cloudy
Partly cloudy
 25° /14° 0.1 mm 6
18 Sept. Sunny
Sunny
 28° /15° 0 mm 1.2
19 Sept. Sunny
Sunny
 32° /18° 0 mm 1.1
20 Sept. Moderate rain
Moderate rain
 24° /18° 11.6 mm 1
21 Sept. Moderate rain
Moderate rain
 21° /15° 5.3 mm 0.9
22 Sept. Patchy rain possible
Patchy rain possible
 20° /12° 0.7 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 2.5 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 1 mm 3
25 Sept. Partly cloudy
Partly cloudy
 21° /12° 0 mm 5
26 Sept. Partly cloudy
Partly cloudy
 18° /14° 0 mm 5
27 Sept. Partly cloudy
Partly cloudy
 18° /13° 0 mm 4
28 Sept. Sunny
Sunny
 18° /9° 0 mm 4
29 Sept. Sunny
Sunny
 17° /9° 0 mm 4
30 Sept. Partly cloudy
Partly cloudy
 17° /8° 0 mm 4
Next
Important Notice
Our weather forecast for Val d'Oise in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Val d'Oise forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Val d'Oise weather in September vs August vs October

Compare September weather in Val d'Oise with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures25°/15°23°/14°18°/11°
Rainfall87 mm74 mm83 mm
Wind16.2 km/h17.2 km/h17.7 km/h
Humidity64%65%70%
Rainy days15 days13 days15 days
Dry days16 days17 days16 days

Planning a trip to Val d'Oise? Discover the best time to visit

Val d'Oise in September - FAQ

What are the expected maximum and minimum temperatures in Val d'Oise during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Val d'Oise during September?
Moderate rainfall is anticipated in Val d'Oise during September, with a total of 73.6 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Val d'Oise during September?
The average wind speed in Val d'Oise during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Val d'Oise in September?

As you prepare for your trip to Val d'Oise in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Val d'Oise, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in Val d'Oise

Explore the daily rainfall trends and prepare for Val d'Oises September weather 💧

UV exposure in Val d'Oise during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Val d'Oise?

Get accurate weather forecasts for Val d'Oise, located at latitude 49.039 and longitude 2.078. Stay updated with localized weather information tailored for Val d'Oise.

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