S
M
T
W
T
F
S
30
65°
49°
31
73°
44°
1
64°
44°
2
66°
45°
3
63°
51°
4
65°
50°
5
71°
51°
6
71°
50°
7
61°
43°
8
60°
43°
9
61°
44°
10
61°
47°
11
66°
50°
12
65°
50°
13
59°
49°
14
61°
51°
15
59°
49°
16
60°
49°
17
60°
47°
18
59°
49°
19
58°
45°
20
61°
41°
21
62°
40°
22
58°
41°
23
57°
41°
24
59°
45°
25
65°
47°
26
66°
47°
27
Hist. Avg.
59°
44°
28
Hist. Avg.
58°
44°
29
Hist. Avg.
58°
44°
30
Hist. Avg.
57°
43°
1
Hist. Avg.
57°
43°
2
Hist. Avg.
56°
43°
3
Hist. Avg.
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Snoqualmie Pass
Snoqualmie Pass's September 2026 forecast shows daily high temperatures ranging from 57° to 73°, with overnight lows between 40° and 51°. The average high for September is 63° with an average low of 47°. 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 Snoqualmie Pass. See also: October | November | December.
