S
M
T
W
T
F
S
30
71°
55°
31
76°
54°
1
66°
57°
2
70°
55°
3
68°
53°
4
70°
53°
5
70°
52°
6
74°
53°
7
70°
57°
8
74°
55°
9
78°
54°
10
72°
52°
11
70°
52°
12
70°
53°
13
65°
54°
14
74°
49°
15
75°
50°
16
78°
52°
17
80°
51°
18
76°
50°
19
70°
50°
20
68°
49°
21
70°
50°
22
71°
51°
23
68°
48°
24
68°
46°
25
61°
51°
26
62°
47°
27
61°
44°
28
60°
44°
29
60°
42°
30
61°
42°
1
62°
51°
2
63°
49°
3
60°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Snoqualmie
Snoqualmie's September 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 42° and 54°. The average high for September is 68° with an average low of 49°. 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. See also: October | November | December.
