S
M
T
W
T
F
S
30
84°
57°
31
76°
58°
1
76°
58°
2
75°
63°
3
81°
55°
4
78°
55°
5
75°
60°
6
77°
61°
7
82°
61°
8
81°
62°
9
81°
61°
10
80°
59°
11
76°
59°
12
73°
61°
13
81°
60°
14
70°
50°
15
70°
50°
16
Hist. Avg.
74°
58°
17
Hist. Avg.
73°
58°
18
Hist. Avg.
73°
57°
19
Hist. Avg.
72°
57°
20
Hist. Avg.
72°
56°
21
Hist. Avg.
72°
56°
22
Hist. Avg.
71°
55°
23
Hist. Avg.
71°
55°
24
Hist. Avg.
70°
55°
25
Hist. Avg.
70°
54°
26
Hist. Avg.
70°
54°
27
Hist. Avg.
69°
53°
28
Hist. Avg.
69°
53°
29
Hist. Avg.
68°
53°
30
Hist. Avg.
68°
52°
1
Hist. Avg.
68°
52°
2
Hist. Avg.
67°
51°
3
Hist. Avg.
67°
51°
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 70° to 84°, with overnight lows between 50° and 63°. The average high for September is 77° with an average low of 58°. 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.
