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Weather in Saint-Lazare for September 2025

Your guide to Saint-Lazare weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Saint-Lazare is slightly cooler than the historical average by -0.8 °C.

  • Expect cooler weather in the next days in Saint-Lazare with the forecast suggesting a temperature of 21.9 °C, lower than the historical average.

  • In general, the average temperature in Saint-Lazare at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.

    • Rain 🌧️

  • Saint-Lazare experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 121.9 mm.

    • More

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

Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Saint-Lazare Weather September

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

Temperatures trend during September in Saint-Lazare

See the weather trend as well as the moving average line

September weather in Saint-Lazare day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 25° /10° 2.4 mm 5
2 Sept. Mist
Mist
 23° /12° 0 mm 5
3 Sept. Fog
Fog
 24° /13° 0 mm 6
4 Sept. Cloudy
Cloudy
 27° /14° 11.5 mm 6
5 Sept. Mist
Mist
 26° /14° 5 mm 6
6 Sept. Cloudy
Cloudy
 25° /16° 7.7 mm 5
7 Sept. Light rain shower
Light rain shower
 22° /12° 7.8 mm 5
8 Sept. Light rain shower
Light rain shower
 20° /11° 6.6 mm 5
9 Sept. Cloudy
Cloudy
 21° /8° 0 mm 5
10 Sept. Light rain shower
Light rain shower
 22° /10° 2.3 mm 5
11 Sept. Overcast
Overcast
 22° /12° 1.1 mm 5
12 Sept. Mist
Mist
 23° /11° 1.5 mm 5
13 Sept. Moderate rain
Moderate rain
 20° /12° 4.4 mm 5
14 Sept. Overcast
Overcast
 21° /12° 0.4 mm 5
15 Sept. Mist
Mist
 24° /12° 0 mm 6
16 Sept. Sunny
Sunny
 27° /12° 0 mm 1.2
17 Sept. Partly cloudy
Partly cloudy
 25° /11° 0 mm 1.1
18 Sept. Moderate rain
Moderate rain
 27° /17° 9.4 mm 1.1
19 Sept. Moderate rain
Moderate rain
 19° /8° 13.2 mm 1.2
20 Sept. Sunny
Sunny
 17° /6° 0 mm 0
21 Sept. Partly cloudy
Partly cloudy
 25° /8° 0 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 30° /16° 0.3 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 30° /19° 1.4 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 23° /13° 0.2 mm 4
25 Sept. Overcast
Overcast
 18° /11° 0.1 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 16° /7° 0.5 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 13° /6° 0.1 mm 3
28 Sept. Sunny
Sunny
 16° /5° 0 mm 3
29 Sept. Sunny
Sunny
 21° /6° 0 mm 4
30 Sept. Mist
Mist
 23° /11° 0 mm 5
Next
Important Notice
Our weather forecast for Saint-Lazare 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 Saint-Lazare forecast closer to your planned date for the most up-to-date weather information.
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Saint-Lazare in September - FAQ

What are the expected maximum and minimum temperatures in Saint-Lazare during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Saint-Lazare during September?
Significant rainfall exceeding 121.9 mm is expected in Saint-Lazare during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Saint-Lazare during September?
The average wind speed in Saint-Lazare during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Saint-Lazare

Explore the daily rainfall trends and prepare for Saint-Lazares September weather 💧

UV exposure in Saint-Lazare during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Saint-Lazare?

Get accurate weather forecasts for Saint-Lazare, located at latitude 45.4 and longitude -74.133. Stay updated with localized weather information tailored for Saint-Lazare.

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