S
M
T
W
T
F
S
30
81°
57°
31
81°
59°
1
82°
59°
2
86°
60°
3
87°
52°
4
83°
50°
5
79°
49°
6
77°
54°
7
79°
57°
8
79°
53°
9
81°
53°
10
83°
54°
11
84°
52°
12
78°
48°
13
77°
46°
14
78°
48°
15
79°
50°
16
84°
53°
17
83°
52°
18
84°
53°
19
83°
53°
20
Hist. Avg.
80°
50°
21
Hist. Avg.
80°
49°
22
Hist. Avg.
79°
49°
23
Hist. Avg.
79°
48°
24
Hist. Avg.
78°
48°
25
Hist. Avg.
78°
47°
26
Hist. Avg.
77°
47°
27
Hist. Avg.
77°
46°
28
Hist. Avg.
76°
46°
29
Hist. Avg.
76°
46°
30
Hist. Avg.
75°
45°
1
Hist. Avg.
75°
45°
2
Hist. Avg.
74°
44°
3
Hist. Avg.
74°
44°
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 77° to 87°, with overnight lows between 46° and 60°. The average high for September is 81° with an average low of 53°. 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.
