S
M
T
W
T
F
S
30
68°
50°
31
71°
57°
1
73°
59°
2
74°
58°
3
71°
55°
4
68°
53°
5
67°
51°
6
67°
51°
7
68°
56°
8
70°
53°
9
65°
50°
10
66°
47°
11
69°
44°
12
63°
45°
13
65°
47°
14
64°
46°
15
62°
44°
16
64°
43°
17
62°
44°
18
65°
48°
19
61°
45°
20
62°
43°
21
60°
42°
22
62°
45°
23
65°
45°
24
67°
42°
25
68°
48°
26
68°
49°
27
67°
48°
28
59°
43°
29
65°
45°
30
66°
39°
1
58°
46°
2
65°
48°
3
65°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Ashburnham
South Ashburnham's September 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 38° and 59°. The average high for September is 66° with an average low of 48°. 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 South Ashburnham. See also: October | November | December.
