S
M
T
W
T
F
S
30
79°
59°
31
79°
57°
1
78°
53°
2
71°
52°
3
70°
52°
4
70°
49°
5
71°
49°
6
74°
57°
7
77°
57°
8
72°
56°
9
70°
56°
10
74°
55°
11
77°
55°
12
76°
56°
13
77°
57°
14
78°
46°
15
69°
46°
16
67°
45°
17
69°
46°
18
67°
44°
19
66°
45°
20
67°
48°
21
74°
51°
22
74°
52°
23
73°
44°
24
73°
41°
25
67°
42°
26
67°
44°
27
72°
50°
28
71°
49°
29
71°
41°
30
67°
40°
1
64°
40°
2
64°
43°
3
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in North Walpole
North Walpole's September 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 40° and 59°. The average high for September is 72° 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 North Walpole. See also: October | November | December.