S
M
T
W
T
F
S
30
70°
49°
31
71°
56°
1
74°
57°
2
69°
58°
3
78°
58°
4
79°
55°
5
79°
54°
6
72°
47°
7
68°
48°
8
71°
54°
9
74°
49°
10
74°
53°
11
72°
48°
12
71°
54°
13
72°
53°
14
76°
49°
15
67°
52°
16
65°
51°
17
64°
52°
18
65°
47°
19
72°
43°
20
65°
49°
21
69°
42°
22
67°
43°
23
66°
42°
24
68°
42°
25
70°
49°
26
70°
47°
27
66°
51°
28
67°
46°
29
69°
39°
30
61°
46°
1
67°
47°
2
69°
43°
3
66°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Steamburg
Steamburg's September 2026 forecast shows daily high temperatures ranging from 61° to 79°, with overnight lows between 39° and 58°. The average high for September is 70° with an average low of 49°. 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 Steamburg. See also: October | November | December.