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Weather in Saint-Lazare for September 2026

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

    Temperatures

  • Until now, September 2026 in Saint-Lazare has been nearly identical to the historical average, with a temperature of 23.4 °C (showing only a slight deviation of 0.2 °C).

  • The forecast for the next days in Saint-Lazare predicts a temperature of 18.5 °C, which is cooler 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 18.9 °C by the end of September.

    • Rain 🌧️

  • The climate of Saint-Lazare in September is notably wet, with an average of 14 rainy days, and a total of 142.3 mm of precipitation.

    • More

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Average dry days
16
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
74 %
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
24°
3
Fog
25°
4
Cloudy
26°
5
Mist
25°
6
Cloudy
24°
7
Light rain shower
23°
8
Light rain shower
21°
9
Cloudy
21°
10
Light rain shower
22°
11
Overcast
21°
12
Sunny
25°
13
Patchy rain possible
23°
14
Sunny
17°
15
Overcast
18°
16
Overcast
22°
17
Overcast
18°
18
Sunny
21°
19
Overcast
20°
20
Overcast
18°
21
Sunny
13°
22
Overcast
17°
23
Patchy rain possible
21°
24
Patchy rain possible
14°
25
Sunny
12°
26
Sunny
20°
27
Cloudy
21°
28
Cloudy
22°
29
Mist
22°
30
Mist
21°

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° /11° 1.8 mm 5
2 Sept. Mist
Mist
 24° /13° 76.5 mm 5
3 Sept. Fog
Fog
 25° /14° 40.5 mm 6
4 Sept. Cloudy
Cloudy
 26° /14° 8.8 mm 7
5 Sept. Mist
Mist
 25° /14° 31.9 mm 6
6 Sept. Cloudy
Cloudy
 24° /15° 5.7 mm 6
7 Sept. Light rain shower
Light rain shower
 23° /12° 5.9 mm 5
8 Sept. Light rain shower
Light rain shower
 21° /12° 11.4 mm 4
9 Sept. Cloudy
Cloudy
 21° /9° 5.3 mm 4
10 Sept. Light rain shower
Light rain shower
 22° /11° 1.8 mm 6
11 Sept. Overcast
Overcast
 21° /11° 0.8 mm 6
12 Sept. Sunny
Sunny
 25° /9° 0 mm 5.3
13 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 2.5 mm 2.1
14 Sept. Sunny
Sunny
 17° /8° 0 mm 4.8
15 Sept. Overcast
Overcast
 18° /8° 0.2 mm 4.9
16 Sept. Overcast
Overcast
 22° /14° 0.1 mm 4.8
17 Sept. Overcast
Overcast
 18° /12° 2.5 mm 4
18 Sept. Sunny
Sunny
 21° /12° 0 mm 6
19 Sept. Overcast
Overcast
 20° /12° 0 mm 4
20 Sept. Overcast
Overcast
 18° /8° 0 mm 4
21 Sept. Sunny
Sunny
 13° /5° 0 mm 4
22 Sept. Overcast
Overcast
 17° /5° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 21° /11° 1.6 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 1.3 mm 4
25 Sept. Sunny
Sunny
 12° /2° 0 mm 4
26 Sept. Sunny
Sunny
 20° /11° 41.4 mm 5
27 Sept. Cloudy
Cloudy
 21° /7° 0 mm 5
28 Sept. Cloudy
Cloudy
 22° /11° 0 mm 5
29 Sept. Mist
Mist
 22° /9° 0 mm 5
30 Sept. Mist
Mist
 21° /10° 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 142.3 mm is expected in Saint-Lazare during September, occurring over more than 14 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 💧
Typically, Saint-Lazare has 14 rainy days in September with a total of 142.3 mm of rainfall.

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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