S
M
T
W
T
F
S
30
79°
46°
31
78°
46°
1
77°
50°
2
77°
53°
3
82°
51°
4
85°
49°
5
79°
49°
6
78°
50°
7
82°
54°
8
83°
50°
9
75°
42°
10
76°
41°
11
71°
42°
12
72°
40°
13
73°
39°
14
70°
40°
15
69°
39°
16
69°
41°
17
71°
44°
18
75°
45°
19
72°
42°
20
71°
40°
21
69°
39°
22
65°
41°
23
70°
40°
24
Hist. Avg.
70°
46°
25
Hist. Avg.
70°
46°
26
Hist. Avg.
69°
45°
27
Hist. Avg.
69°
45°
28
Hist. Avg.
68°
44°
29
Hist. Avg.
68°
44°
30
Hist. Avg.
67°
44°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Billings
Billings's September 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 39° and 54°. The average high for September is 75° with an average low of 45°. 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 Billings. See also: October | November | December.
