S
M
T
W
T
F
S
30
79°
57°
31
79°
56°
1
78°
54°
2
77°
52°
3
75°
52°
4
74°
51°
5
71°
45°
6
69°
53°
7
71°
54°
8
76°
54°
9
77°
55°
10
67°
47°
11
66°
48°
12
68°
49°
13
73°
55°
14
76°
55°
15
75°
50°
16
67°
45°
17
65°
50°
18
72°
48°
19
74°
48°
20
Hist. Avg.
70°
51°
21
Hist. Avg.
70°
51°
22
Hist. Avg.
69°
51°
23
Hist. Avg.
69°
50°
24
Hist. Avg.
68°
50°
25
Hist. Avg.
68°
50°
26
Hist. Avg.
68°
50°
27
Hist. Avg.
67°
49°
28
Hist. Avg.
67°
49°
29
Hist. Avg.
66°
49°
30
Hist. Avg.
66°
49°
1
Hist. Avg.
66°
48°
2
Hist. Avg.
65°
48°
3
Hist. Avg.
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Snoqualmie
Snoqualmie's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 45° and 57°. The average high for September is 73° with an average low of 51°. 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.
