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Chatham, ON
Your 2026 Fall Forecast is here!
Content continues below
September
Average Temperature
High
23°
Feels 24
Low
13°
Feels 12
Average Precipitation
11 Days
Rain amount
65.9mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
25°
11
24°
12
25°
13
25°
14
21°
15
25°
16
24°
17
20°
18
20°
19
18°
20
18°
21
19°
22
20°
23
20°
24
20°
25
26
27
28
29
30
Forecast
Thursday, September 10, 2026
Day
25°
Feels 30
Wind
15 km/h W
Gust
23 km/h
Humidity
57%
P.O.P
30%
Night
14°
Feels 13
Wind
12 km/h NE
Gust
18 km/h
Humidity
92%
P.O.P
30%
Historical Averages
Sep 10
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.