S
M
T
W
T
F
S
30
84°
60°
31
84°
62°
1
81°
64°
2
83°
62°
3
78°
60°
4
80°
61°
5
77°
54°
6
71°
51°
7
78°
57°
8
78°
56°
9
75°
57°
10
75°
56°
11
72°
50°
12
73°
49°
13
74°
50°
14
76°
54°
15
78°
55°
16
78°
55°
17
76°
54°
18
78°
56°
19
77°
56°
20
72°
55°
21
76°
54°
22
77°
55°
23
77°
54°
24
76°
52°
25
70°
49°
26
66°
44°
27
68°
46°
28
72°
49°
29
73°
50°
30
74°
50°
1
73°
49°
2
72°
50°
3
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Amherst
Amherst's September 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 44° and 64°. The average high for September is 76° 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.
