S
M
T
W
T
F
S
30
75°
48°
31
77°
55°
1
78°
57°
2
84°
56°
3
85°
56°
4
78°
48°
5
74°
48°
6
76°
51°
7
75°
46°
8
75°
47°
9
74°
54°
10
72°
53°
11
73°
50°
12
73°
47°
13
74°
52°
14
74°
54°
15
80°
53°
16
81°
47°
17
78°
48°
18
77°
46°
19
80°
46°
20
79°
53°
21
79°
51°
22
76°
47°
23
72°
49°
24
71°
47°
25
69°
47°
26
72°
46°
27
70°
52°
28
69°
51°
29
68°
49°
30
68°
50°
1
73°
52°
2
73°
51°
3
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sheridan
Sheridan's September 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 46° and 57°. The average high for September is 75° with an average low of 50°. 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 Sheridan. See also: October | November | December.