S
M
T
W
T
F
S
30
75°
64°
31
85°
70°
1
87°
73°
2
91°
71°
3
91°
69°
4
76°
66°
5
77°
60°
6
76°
55°
7
77°
54°
8
84°
56°
9
87°
69°
10
80°
61°
11
77°
57°
12
74°
60°
13
80°
59°
14
69°
52°
15
86°
68°
16
78°
65°
17
77°
65°
18
75°
60°
19
73°
56°
20
70°
55°
21
71°
52°
22
69°
51°
23
70°
52°
24
72°
53°
25
73°
54°
26
74°
50°
27
75°
56°
28
75°
56°
29
74°
55°
30
73°
56°
1
72°
56°
2
74°
54°
3
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Amherst
South Amherst's September 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 50° and 68°. The average high for September is 74° with an average low of 56°. 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 South Amherst. See also: October | November | December.
