S
M
T
W
T
F
S
30
73°
54°
31
74°
54°
1
72°
53°
2
72°
53°
3
71°
52°
4
71°
49°
5
67°
48°
6
68°
52°
7
69°
50°
8
71°
52°
9
69°
51°
10
70°
49°
11
68°
47°
12
69°
48°
13
69°
49°
14
67°
50°
15
66°
46°
16
66°
45°
17
64°
44°
18
64°
46°
19
63°
48°
20
64°
47°
21
63°
44°
22
64°
45°
23
64°
46°
24
63°
47°
25
63°
47°
26
64°
49°
27
Hist. Avg.
62°
48°
28
Hist. Avg.
62°
48°
29
Hist. Avg.
62°
48°
30
Hist. Avg.
61°
48°
1
Hist. Avg.
61°
48°
2
Hist. Avg.
61°
47°
3
Hist. Avg.
60°
47°
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 63° to 74°, with overnight lows between 44° and 54°. The average high for September is 67° with an average low of 49°. 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.
