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
78°
54°
9
81°
57°
10
72°
52°
11
68°
54°
12
67°
50°
13
68°
48°
14
71°
49°
15
75°
50°
16
72°
49°
17
74°
51°
18
76°
51°
19
74°
50°
20
72°
51°
21
67°
48°
22
63°
47°
23
63°
45°
24
68°
46°
25
69°
52°
26
62°
49°
27
62°
48°
28
61°
44°
29
60°
42°
30
62°
43°
1
67°
47°
2
69°
48°
3
68°
49°
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 81°, with overnight lows between 42° and 57°. The average high for September is 69° 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.
