S
M
T
W
T
F
S
30
84°
63°
31
85°
55°
1
80°
55°
2
78°
56°
3
80°
56°
4
82°
58°
5
83°
55°
6
77°
55°
7
76°
54°
8
77°
58°
9
77°
54°
10
76°
53°
11
77°
53°
12
75°
55°
13
76°
54°
14
75°
53°
15
76°
54°
16
75°
52°
17
76°
50°
18
75°
55°
19
76°
56°
20
73°
56°
21
78°
55°
22
Hist. Avg.
74°
50°
23
Hist. Avg.
74°
50°
24
Hist. Avg.
73°
49°
25
Hist. Avg.
73°
49°
26
Hist. Avg.
72°
48°
27
Hist. Avg.
72°
48°
28
Hist. Avg.
72°
48°
29
Hist. Avg.
71°
47°
30
Hist. Avg.
71°
47°
1
Hist. Avg.
71°
46°
2
Hist. Avg.
70°
46°
3
Hist. Avg.
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Harrisonburg
Harrisonburg's September 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 50° and 63°. The average high for September is 78° with an average low of 55°. 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 Harrisonburg. See also: October | November | December.
