S
M
T
W
T
F
S
30
61°
45°
31
68°
40°
1
66°
41°
2
63°
45°
3
61°
42°
4
59°
40°
5
63°
44°
6
66°
46°
7
Hist. Avg.
63°
40°
8
Hist. Avg.
62°
40°
9
Hist. Avg.
62°
39°
10
Hist. Avg.
61°
39°
11
Hist. Avg.
61°
39°
12
Hist. Avg.
61°
39°
13
Hist. Avg.
60°
38°
14
Hist. Avg.
60°
38°
15
Hist. Avg.
60°
38°
16
Hist. Avg.
59°
38°
17
Hist. Avg.
59°
37°
18
Hist. Avg.
59°
37°
19
Hist. Avg.
58°
37°
20
Hist. Avg.
58°
37°
21
Hist. Avg.
58°
36°
22
Hist. Avg.
57°
36°
23
Hist. Avg.
57°
36°
24
Hist. Avg.
57°
36°
25
Hist. Avg.
56°
35°
26
Hist. Avg.
56°
35°
27
Hist. Avg.
56°
35°
28
Hist. Avg.
55°
35°
29
Hist. Avg.
55°
34°
30
Hist. Avg.
55°
34°
1
Hist. Avg.
54°
34°
2
Hist. Avg.
54°
34°
3
Hist. Avg.
53°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Harmon Valley
Harmon Valley's September 2026 forecast shows daily high temperatures ranging from 59° to 68°, with overnight lows between 40° and 46°. The average high for September is 63° with an average low of 43°. 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 Harmon Valley. See also: October | November | December.
