The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Chatham, MA
Content continues below
September
Average Temperature
High
21°
Feels 21
Low
15°
Feels 15
Average Precipitation
8 Days
Rain amount
70.8mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
22°
3
23°
4
23°
5
20°
6
19°
7
20°
8
22°
9
21°
10
23°
11
22°
12
22°
13
21°
14
22°
15
22°
16
21°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Wednesday, September 2, 2026
Day
22°
Feels 22
Wind
24 km/h E
Gust
35 km/h
Humidity
65%
P.O.P
20%
Night
18°
Feels 18
Wind
24 km/h SE
Gust
36 km/h
Humidity
94%
P.O.P
30%
Historical Averages
Sep 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.