S
M
T
W
T
F
S
30
78°
58°
31
79°
57°
1
78°
52°
2
76°
50°
3
77°
52°
4
73°
54°
5
77°
54°
6
77°
53°
7
76°
48°
8
72°
46°
9
68°
47°
10
69°
55°
11
74°
48°
12
75°
54°
13
75°
54°
14
73°
53°
15
73°
53°
16
76°
53°
17
Hist. Avg.
70°
49°
18
Hist. Avg.
70°
49°
19
Hist. Avg.
69°
48°
20
Hist. Avg.
69°
48°
21
Hist. Avg.
68°
47°
22
Hist. Avg.
68°
47°
23
Hist. Avg.
68°
46°
24
Hist. Avg.
67°
46°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
66°
45°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
65°
44°
29
Hist. Avg.
65°
44°
30
Hist. Avg.
64°
44°
1
Hist. Avg.
64°
43°
2
Hist. Avg.
64°
43°
3
Hist. Avg.
63°
42°
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 79°, with overnight lows between 46° and 58°. The average high for September is 75° with an average low of 52°. 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.
