S
M
T
W
T
F
S
30
74°
51°
31
76°
47°
1
74°
46°
2
72°
42°
3
70°
42°
4
73°
45°
5
74°
49°
6
74°
49°
7
69°
48°
8
72°
45°
9
72°
47°
10
74°
45°
11
73°
48°
12
72°
46°
13
72°
48°
14
73°
46°
15
71°
38°
16
67°
38°
17
62°
44°
18
63°
46°
19
72°
45°
20
70°
43°
21
71°
35°
22
69°
33°
23
Hist. Avg.
64°
41°
24
Hist. Avg.
63°
41°
25
Hist. Avg.
63°
40°
26
Hist. Avg.
63°
40°
27
Hist. Avg.
62°
40°
28
Hist. Avg.
62°
39°
29
Hist. Avg.
61°
39°
30
Hist. Avg.
61°
39°
1
Hist. Avg.
61°
38°
2
Hist. Avg.
60°
38°
3
Hist. Avg.
60°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Blue Mountain
Blue Mountain's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 33° and 51°. The average high for September is 71° with an average low of 44°. 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 Blue Mountain. See also: October | November | December.
