S
M
T
W
T
F
S
30
80°
56°
31
79°
56°
1
63°
56°
2
65°
58°
3
71°
57°
4
75°
55°
5
66°
50°
6
67°
50°
7
71°
52°
8
69°
51°
9
70°
57°
10
71°
55°
11
70°
54°
12
70°
52°
13
69°
50°
14
66°
51°
15
66°
48°
16
67°
53°
17
71°
51°
18
62°
47°
19
64°
45°
20
67°
50°
21
70°
53°
22
71°
53°
23
71°
52°
24
70°
50°
25
69°
49°
26
70°
50°
27
69°
51°
28
69°
49°
29
67°
45°
30
59°
42°
1
58°
41°
2
59°
48°
3
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wachusett Mountain
Wachusett Mountain's September 2026 forecast shows daily high temperatures ranging from 58° to 75°, with overnight lows between 41° and 58°. The average high for September is 68° 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 Wachusett Mountain. See also: October | November | December.
