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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Chatham, ON
Exceptional El Niño dominates this fall
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Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
23°
18
23°
19
20°
20
21°
21
17°
22
18°
23
16°
24
18°
25
20°
26
20°
27
19°
28
19°
29
20°
30
20°
Forecast
Thursday, September 17, 2026
Day
23°
Feels 27
Wind
13 km/h N
Gust
24 km/h
Humidity
65%
P.O.P
40%
Rain
~1 mm
Night
14°
Feels 13
Wind
15 km/h N
Gust
23 km/h
Humidity
82%
P.O.P
20%
Historical Averages
Sep 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
September
Average Temperature
High
23°
Feels 24
Low
13°
Feels 12
Average Precipitation
11 Days
Rain amount
65.9mm
Snow amount
0cm