S
M
T
W
T
F
S
30
75°
64°
31
85°
70°
1
89°
73°
2
92°
73°
3
85°
68°
4
80°
67°
5
75°
60°
6
77°
58°
7
76°
58°
8
73°
57°
9
78°
62°
10
75°
58°
11
76°
55°
12
75°
59°
13
78°
58°
14
78°
60°
15
77°
59°
16
78°
59°
17
77°
58°
18
72°
55°
19
76°
58°
20
78°
59°
21
79°
59°
22
78°
58°
23
79°
58°
24
78°
57°
25
77°
57°
26
76°
56°
27
77°
57°
28
76°
56°
29
75°
55°
30
74°
54°
1
74°
54°
2
73°
55°
3
75°
54°
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 72° to 92°, with overnight lows between 54° and 73°. The average high for September is 77° with an average low of 59°. 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.
