S
M
T
W
T
F
S
30
68°
55°
31
76°
54°
1
75°
52°
2
71°
50°
3
74°
49°
4
73°
52°
5
74°
45°
6
70°
44°
7
68°
52°
8
68°
47°
9
67°
40°
10
63°
50°
11
65°
49°
12
69°
46°
13
68°
48°
14
70°
49°
15
71°
51°
16
63°
44°
17
61°
44°
18
61°
41°
19
Hist. Avg.
62°
51°
20
Hist. Avg.
62°
50°
21
Hist. Avg.
62°
50°
22
Hist. Avg.
62°
50°
23
Hist. Avg.
61°
49°
24
Hist. Avg.
61°
49°
25
Hist. Avg.
61°
49°
26
Hist. Avg.
60°
49°
27
Hist. Avg.
60°
48°
28
Hist. Avg.
60°
48°
29
Hist. Avg.
59°
48°
30
Hist. Avg.
59°
47°
1
Hist. Avg.
58°
47°
2
Hist. Avg.
58°
47°
3
Hist. Avg.
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Whitefish
Whitefish's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 40° and 55°. The average high for September is 69° with an average low of 48°. 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 Whitefish. See also: October | November | December.
