S
M
T
W
T
F
S
30
70°
57°
31
72°
55°
1
72°
50°
2
66°
59°
3
77°
64°
4
66°
54°
5
70°
50°
6
79°
55°
7
72°
59°
8
N/A
9
67°
47°
10
65°
57°
11
71°
47°
12
69°
59°
13
71°
55°
14
72°
58°
15
71°
51°
16
66°
50°
17
67°
52°
18
68°
52°
19
67°
51°
20
68°
50°
21
67°
52°
22
67°
52°
23
66°
52°
24
67°
51°
25
65°
47°
26
63°
49°
27
63°
46°
28
64°
48°
29
63°
48°
30
64°
49°
1
62°
44°
2
64°
50°
3
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Andover
Andover's September 2026 forecast shows daily high temperatures ranging from 62° to 72°, with overnight lows between 44° and 59°. The average high for September is 66° with an average low of 51°. 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 Andover. See also: October | November | December.