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Canada weather

Weather in Chatham for September 2025

Your guide to Chatham weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Fog Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Chatham is cooler than usual, with temperatures averaging 21.8 °C, this is -2.1 °C below the typical seasonal average.

  • The forecast for the upcoming days in Chatham predicts a temperature of 25.4 °C, which is slightly above the historical average.

  • In general, the average temperature in Chatham at the beginning of September is 24.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 22.7 °C by the end of September.

    • Rain 🌧️

  • Chatham experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 46.5 mm.

    • More

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

Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/14°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Chatham Weather September

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

Temperatures trend during September in Chatham

See the weather trend as well as the moving average line

September weather in Chatham day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 24° /10° 0.1 mm 5
2 Sept. Mist
Mist
 22° /11° 0 mm 5
3 Sept. Cloudy
Cloudy
 27° /14° 0 mm 7
4 Sept. Partly cloudy
Partly cloudy
 25° /15° 19.2 mm 6
5 Sept. Partly cloudy
Partly cloudy
 27° /16° 0 mm 7
6 Sept. Light rain shower
Light rain shower
 24° /14° 4.1 mm 5
7 Sept. Light rain shower
Light rain shower
 20° /12° 2.5 mm 5
8 Sept. Sunny
Sunny
 20° /9° 0.1 mm 5
9 Sept. Mist
Mist
 24° /11° 0 mm 6
10 Sept. Overcast
Overcast
 24° /13° 0 mm 5
11 Sept. Fog
Fog
 25° /14° 0.4 mm 6
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /13° 5.6 mm 5
13 Sept. Mist
Mist
 23° /12° 0 mm 5
14 Sept. Partly cloudy
Partly cloudy
 26° /12° 0 mm 1.4
15 Sept. Fog
Fog
 27° /13° 0 mm 1.4
16 Sept. Fog
Fog
 29° /14° 0 mm 1.4
17 Sept. Sunny
Sunny
 28° /14° 0 mm 1.4
18 Sept. Sunny
Sunny
 30° /17° 0 mm 0
19 Sept. Patchy rain possible
Patchy rain possible
 30° /18° 0.1 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
 26° /15° 1.1 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 21° /17° 1.9 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 0.1 mm 4
23 Sept. Partly cloudy
Partly cloudy
 21° /11° 0 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 0.3 mm 3
25 Sept. Sunny
Sunny
 25° /12° 0 mm 5
26 Sept. Sunny
Sunny
 27° /15° 0 mm 5
27 Sept. Sunny
Sunny
 27° /16° 0 mm 6
28 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 19° /15° 9.1 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 21° /15° 0.2 mm 5
30 Sept. Mist
Mist
 22° /15° 0 mm 5
Next
Important Notice
Our weather forecast for Chatham 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 Chatham forecast closer to your planned date for the most up-to-date weather information.
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Chatham in September - FAQ

What are the expected maximum and minimum temperatures in Chatham 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 Chatham during September?
In September, Chatham can expect light to moderate rainfall, totaling 46.5 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Chatham during September?
The average wind speed in Chatham during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Chatham

Explore the daily rainfall trends and prepare for Chathams September weather 💧

UV exposure in Chatham during September

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

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Get accurate weather forecasts for Chatham, located at latitude 42.412 and longitude -82.185. Stay updated with localized weather information tailored for Chatham.

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