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Lambton County (Sarnia)
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Weather in Lambton County for September 2026

Your guide to Lambton County weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Lambton County has been nearly identical to the historical average, with a temperature of 23 °C (showing only a slight deviation of 0.3 °C).

  • The forecast for the next days in Lambton County predicts a temperature of 17.6 °C, which is cooler than the historical average.

  • In general, the average temperature in Lambton County at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.

    • Rain 🌧️

  • Lambton County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 75 mm.

    • More

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

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/13°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Lambton County Weather September

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

Temperatures trend during September in Lambton County

See the weather trend as well as the moving average line

September weather in Lambton County day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 26° /14° 0 mm 6
2 Sept. Overcast
Overcast
 26° /13° 3.8 mm 5
3 Sept. Sunny
Sunny
 28° /14° 1.8 mm 6
4 Sept. Partly cloudy
Partly cloudy
 26° /14° 12.6 mm 6
5 Sept. Sunny
Sunny
 27° /14° 0 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 3.4 mm 6
7 Sept. Light rain shower
Light rain shower
 21° /12° 2.2 mm 5
8 Sept. Patchy rain possible
Patchy rain possible
 22° /10° 0 mm 4
9 Sept. Partly cloudy
Partly cloudy
 24° /13° 3.3 mm 5
10 Sept. Overcast
Overcast
 24° /14° 0.1 mm 5
11 Sept. Partly cloudy
Partly cloudy
 24° /13° 0.2 mm 6
12 Sept. Torrential rain shower
Torrential rain shower
 25° /14° 6.9 mm 5
13 Sept. Overcast
Overcast
 23° /13° 0.1 mm 5
14 Sept. Sunny
Sunny
 22° /12° 0 mm 6
15 Sept. Mist
Mist
 24° /13° 5.7 mm 5
16 Sept. Mist
Mist
 23° /13° 0.8 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
 22° /13° 0.2 mm 4
18 Sept. Fog
Fog
 21° /13° 0.3 mm 5
19 Sept. Fog
Fog
 20° /12° 1.2 mm 4
20 Sept. Patchy rain possible
Patchy rain possible
 22° /12° 0.1 mm 4
21 Sept. Mist
Mist
 23° /14° 11.3 mm 5
22 Sept. Fog
Fog
 24° /14° 8.3 mm 5
23 Sept. Fog
Fog
 21° /13° 6.2 mm 4
24 Sept. Overcast
Overcast
 21° /14° 3.9 mm 5
25 Sept. Partly cloudy
Partly cloudy
 20° /13° 0 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 0.1 mm 4
27 Sept. Sunny
Sunny
 18° /15° 0 mm 4.9
28 Sept. Sunny
Sunny
 18° /14° 0 mm 5
29 Sept. Sunny
Sunny
 22° /14° 0 mm 5.2
30 Sept. Overcast
Overcast
 24° /16° 0 mm 1.2
Next
Important Notice
Our weather forecast for Lambton County 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 Lambton County forecast closer to your planned date for the most up-to-date weather information.
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Lambton County in September - FAQ

What are the expected maximum and minimum temperatures in Lambton County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Lambton County during September?
Moderate rainfall is anticipated in Lambton County during September, with a total of 75 mm spread over approximately 9 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Lambton County during September?
The average wind speed in Lambton County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Lambton County

Explore the daily rainfall trends and prepare for Lambton Countys September weather 💧
Typically, Lambton County has 9 rainy days in September with a total of 75 mm of rainfall.

UV exposure in Lambton County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Lambton County?

Get accurate weather forecasts for Lambton County, located at latitude 42.979 and longitude -82.404. Stay updated with localized weather information tailored for Lambton County.

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