S
M
T
W
T
F
S
30
80°
62°
31
81°
62°
1
81°
61°
2
80°
56°
3
77°
59°
4
81°
60°
5
76°
60°
6
77°
59°
7
74°
59°
8
74°
53°
9
73°
50°
10
72°
57°
11
74°
59°
12
80°
58°
13
79°
59°
14
76°
58°
15
78°
58°
16
70°
51°
17
72°
50°
18
71°
50°
19
Hist. Avg.
76°
55°
20
Hist. Avg.
76°
55°
21
Hist. Avg.
75°
54°
22
Hist. Avg.
75°
54°
23
Hist. Avg.
74°
54°
24
Hist. Avg.
74°
53°
25
Hist. Avg.
74°
53°
26
Hist. Avg.
73°
53°
27
Hist. Avg.
73°
52°
28
Hist. Avg.
72°
52°
29
Hist. Avg.
72°
52°
30
Hist. Avg.
72°
51°
1
Hist. Avg.
71°
51°
2
Hist. Avg.
71°
50°
3
Hist. Avg.
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Amherst
Amherst's September 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 50° and 62°. The average high for September is 76° with an average low of 57°. 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 Amherst. See also: October | November | December.
