S
M
T
W
T
F
S
30
71°
51°
31
71°
52°
1
70°
59°
2
69°
59°
3
69°
58°
4
70°
56°
5
68°
54°
6
69°
50°
7
69°
49°
8
70°
51°
9
70°
49°
10
72°
50°
11
70°
53°
12
65°
49°
13
66°
54°
14
68°
58°
15
Hist. Avg.
72°
52°
16
Hist. Avg.
71°
52°
17
Hist. Avg.
71°
52°
18
Hist. Avg.
71°
52°
19
Hist. Avg.
70°
51°
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 Bellevue
Bellevue's September 2026 forecast shows daily high temperatures ranging from 65° to 72°, with overnight lows between 49° and 59°. The average high for September is 69° with an average low of 53°. 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 Bellevue. See also: October | November | December.
