S
M
T
W
T
F
S
30
74°
51°
31
73°
52°
1
69°
53°
2
72°
51°
3
75°
47°
4
73°
51°
5
74°
51°
6
72°
50°
7
74°
51°
8
74°
50°
9
73°
51°
10
74°
51°
11
73°
50°
12
72°
50°
13
73°
49°
14
72°
50°
15
72°
48°
16
71°
42°
17
70°
41°
18
64°
47°
19
65°
49°
20
71°
48°
21
69°
47°
22
69°
42°
23
Hist. Avg.
63°
44°
24
Hist. Avg.
63°
43°
25
Hist. Avg.
63°
43°
26
Hist. Avg.
62°
43°
27
Hist. Avg.
62°
43°
28
Hist. Avg.
62°
42°
29
Hist. Avg.
62°
42°
30
Hist. Avg.
61°
42°
1
Hist. Avg.
61°
41°
2
Hist. Avg.
61°
41°
3
Hist. Avg.
60°
41°
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 64° to 75°, with overnight lows between 41° and 53°. The average high for September is 72° with an average low of 49°. 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.
