S
M
T
W
T
F
S
31
79°
54°
1
79°
54°
2
90°
49°
3
80°
49°
4
86°
53°
5
68°
48°
6
76°
38°
7
81°
47°
8
92°
53°
9
88°
47°
10
84°
53°
11
82°
60°
12
93°
57°
13
83°
59°
14
66°
56°
15
89°
51°
16
82°
56°
17
70°
53°
18
70°
49°
19
73°
48°
20
78°
49°
21
82°
53°
22
83°
54°
23
61°
53°
24
74°
48°
25
82°
45°
26
87°
43°
27
77°
46°
28
84°
53°
29
81°
54°
30
81°
52°
1
82°
53°
2
86°
47°
3
89°
52°
4
88°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Amherst
Amherst's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
