S
M
T
W
T
F
S
30
75°
54°
31
81°
50°
1
85°
60°
2
91°
61°
3
87°
58°
4
92°
58°
5
85°
56°
6
78°
56°
7
76°
52°
8
79°
51°
9
78°
53°
10
76°
51°
11
81°
50°
12
80°
47°
13
75°
45°
14
76°
46°
15
81°
53°
16
82°
52°
17
79°
48°
18
70°
46°
19
77°
48°
20
79°
51°
21
74°
49°
22
74°
50°
23
80°
51°
24
79°
50°
25
68°
48°
26
75°
48°
27
77°
49°
28
77°
49°
29
75°
48°
30
75°
49°
1
74°
49°
2
75°
48°
3
72°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Billings
Billings's September 2026 forecast shows daily high temperatures ranging from 68° to 92°, with overnight lows between 45° and 61°. The average high for September is 78° with an average low of 51°. 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.
