S
M
T
W
T
F
S
30
76°
56°
31
78°
59°
1
83°
59°
2
83°
57°
3
81°
52°
4
81°
57°
5
80°
53°
6
81°
51°
7
73°
55°
8
72°
56°
9
73°
51°
10
78°
47°
11
73°
56°
12
76°
50°
13
78°
51°
14
75°
48°
15
71°
54°
16
71°
46°
17
77°
45°
18
Hist. Avg.
75°
50°
19
Hist. Avg.
74°
50°
20
Hist. Avg.
74°
50°
21
Hist. Avg.
73°
49°
22
Hist. Avg.
73°
49°
23
Hist. Avg.
72°
48°
24
Hist. Avg.
72°
48°
25
Hist. Avg.
72°
47°
26
Hist. Avg.
71°
47°
27
Hist. Avg.
71°
46°
28
Hist. Avg.
70°
46°
29
Hist. Avg.
70°
46°
30
Hist. Avg.
70°
45°
1
Hist. Avg.
69°
45°
2
Hist. Avg.
69°
44°
3
Hist. Avg.
68°
44°
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 71° to 83°, with overnight lows between 45° and 59°. The average high for September is 77° with an average low of 53°. 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.
