S
M
T
W
T
F
S
30
104°
73°
31
105°
73°
1
104°
72°
2
105°
72°
3
104°
71°
4
103°
70°
5
102°
70°
6
102°
72°
7
103°
71°
8
104°
73°
9
103°
70°
10
102°
69°
11
102°
69°
12
101°
70°
13
102°
72°
14
106°
73°
15
107°
74°
16
107°
75°
17
108°
72°
18
107°
72°
19
106°
70°
20
105°
71°
21
102°
71°
22
101°
67°
23
96°
67°
24
97°
68°
25
103°
67°
26
98°
67°
27
96°
69°
28
96°
61°
29
94°
63°
30
Hist. Avg.
96°
72°
1
Hist. Avg.
96°
72°
2
Hist. Avg.
96°
71°
3
Hist. Avg.
95°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Steam
Steam's September 2026 forecast shows daily high temperatures ranging from 94° to 108°, with overnight lows between 61° and 75°. The average high for September is 102° with an average low of 70°. 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 Steam. See also: October | November | December.
