S
M
T
W
T
F
S
30
78°
56°
31
74°
54°
1
71°
55°
2
71°
53°
3
72°
53°
4
72°
54°
5
71°
54°
6
71°
56°
7
72°
61°
8
71°
55°
9
70°
54°
10
72°
53°
11
71°
53°
12
71°
54°
13
70°
56°
14
69°
54°
15
70°
56°
16
70°
51°
17
69°
50°
18
69°
51°
19
68°
58°
20
68°
56°
21
Hist. Avg.
70°
53°
22
Hist. Avg.
70°
52°
23
Hist. Avg.
70°
52°
24
Hist. Avg.
69°
52°
25
Hist. Avg.
69°
51°
26
Hist. Avg.
68°
51°
27
Hist. Avg.
68°
50°
28
Hist. Avg.
67°
50°
29
Hist. Avg.
67°
50°
30
Hist. Avg.
66°
49°
1
Hist. Avg.
66°
49°
2
Hist. Avg.
66°
49°
3
Hist. Avg.
65°
48°
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 68° to 78°, with overnight lows between 50° and 61°. The average high for September is 71° with an average low of 54°. 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.
