S
M
T
W
T
F
S
30
80°
56°
31
79°
56°
1
69°
60°
2
74°
61°
3
76°
61°
4
81°
63°
5
73°
58°
6
73°
51°
7
80°
54°
8
80°
55°
9
79°
55°
10
85°
64°
11
77°
51°
12
77°
46°
13
69°
62°
14
72°
47°
15
71°
43°
16
80°
49°
17
79°
61°
18
78°
57°
19
66°
43°
20
57°
48°
21
68°
49°
22
66°
42°
23
64°
41°
24
64°
43°
25
63°
51°
26
57°
50°
27
54°
50°
28
55°
50°
29
61°
48°
30
68°
53°
1
71°
52°
2
69°
50°
3
67°
50°
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 54° to 71°, with overnight lows between 43° and 53°. The average high for September is 63° with an average low of 50°. 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.
