S
M
T
W
T
F
S
30
66°
55°
31
66°
54°
1
68°
54°
2
66°
59°
3
72°
63°
4
66°
55°
5
66°
52°
6
77°
57°
7
64°
57°
8
63°
54°
9
63°
52°
10
64°
50°
11
66°
55°
12
68°
54°
13
64°
63°
14
70°
63°
15
69°
50°
16
66°
55°
17
66°
48°
18
62°
58°
19
67°
53°
20
69°
54°
21
70°
54°
22
70°
54°
23
73°
55°
24
72°
53°
25
67°
52°
26
67°
53°
27
68°
51°
28
64°
51°
29
64°
50°
30
63°
49°
1
63°
47°
2
62°
48°
3
63°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cambridge
Cambridge's September 2026 forecast shows daily high temperatures ranging from 62° to 73°, with overnight lows between 47° and 58°. The average high for September is 67° with an average low of 52°. 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.
