S
M
T
W
T
F
S
30
79°
56°
31
78°
61°
1
79°
62°
2
77°
55°
3
77°
53°
4
75°
61°
5
75°
62°
6
83°
61°
7
84°
62°
8
83°
60°
9
83°
59°
10
76°
60°
11
75°
59°
12
77°
59°
13
82°
58°
14
72°
48°
15
71°
48°
16
Hist. Avg.
78°
54°
17
Hist. Avg.
78°
54°
18
Hist. Avg.
77°
53°
19
Hist. Avg.
77°
53°
20
Hist. Avg.
77°
52°
21
Hist. Avg.
76°
52°
22
Hist. Avg.
76°
52°
23
Hist. Avg.
75°
51°
24
Hist. Avg.
75°
51°
25
Hist. Avg.
75°
50°
26
Hist. Avg.
74°
50°
27
Hist. Avg.
74°
50°
28
Hist. Avg.
73°
49°
29
Hist. Avg.
73°
49°
30
Hist. Avg.
72°
48°
1
Hist. Avg.
72°
48°
2
Hist. Avg.
72°
48°
3
Hist. Avg.
71°
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 71° to 84°, with overnight lows between 48° and 62°. The average high for September is 78° with an average low of 58°. 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.
