S
M
T
W
T
F
S
30
82°
43°
31
78°
45°
1
83°
43°
2
79°
44°
3
80°
42°
4
85°
41°
5
82°
41°
6
82°
42°
7
84°
37°
8
83°
39°
9
78°
39°
10
80°
38°
11
76°
37°
12
77°
43°
13
76°
39°
14
74°
41°
15
75°
46°
16
81°
46°
17
83°
44°
18
80°
43°
19
74°
40°
20
76°
38°
21
81°
38°
22
79°
42°
23
80°
43°
24
77°
41°
25
71°
36°
26
71°
40°
27
78°
33°
28
68°
36°
29
67°
43°
30
67°
43°
1
68°
44°
2
77°
31°
3
74°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Redmond
Redmond's September 2026 forecast shows daily high temperatures ranging from 67° to 85°, with overnight lows between 29° and 46°. The average high for September is 77° with an average low of 40°. 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 Redmond. See also: October | November | December.
