S
M
T
W
T
F
S
30
87°
70°
31
88°
69°
1
88°
69°
2
89°
70°
3
90°
70°
4
91°
71°
5
91°
72°
6
87°
71°
7
87°
69°
8
91°
70°
9
89°
71°
10
90°
70°
11
90°
70°
12
89°
69°
13
89°
70°
14
88°
69°
15
89°
71°
16
90°
71°
17
Hist. Avg.
87°
68°
18
Hist. Avg.
87°
68°
19
Hist. Avg.
86°
68°
20
Hist. Avg.
86°
68°
21
Hist. Avg.
86°
67°
22
Hist. Avg.
86°
67°
23
Hist. Avg.
85°
67°
24
Hist. Avg.
85°
66°
25
Hist. Avg.
85°
66°
26
Hist. Avg.
85°
66°
27
Hist. Avg.
84°
66°
28
Hist. Avg.
84°
65°
29
Hist. Avg.
84°
65°
30
Hist. Avg.
83°
64°
1
Hist. Avg.
83°
64°
2
Hist. Avg.
83°
64°
3
Hist. Avg.
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cambridge
Cambridge's September 2026 forecast shows daily high temperatures ranging from 87° to 91°, with overnight lows between 69° and 72°. The average high for September is 89° with an average low of 70°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Cambridge. See also: October | November | December.
