S
M
T
W
T
F
S
30
73°
61°
31
72°
57°
1
73°
56°
2
69°
63°
3
76°
63°
4
73°
52°
5
72°
55°
6
78°
56°
7
76°
52°
8
66°
52°
9
65°
49°
10
64°
49°
11
68°
51°
12
69°
50°
13
70°
52°
14
67°
47°
15
68°
48°
16
66°
47°
17
65°
49°
18
67°
51°
19
68°
50°
20
64°
48°
21
66°
50°
22
67°
51°
23
67°
48°
24
66°
45°
25
65°
44°
26
66°
44°
27
65°
48°
28
66°
49°
29
65°
50°
30
65°
49°
1
66°
49°
2
66°
48°
3
65°
48°
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 64° to 78°, with overnight lows between 44° and 63°. The average high for September is 68° with an average low of 50°. 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.
