S
M
T
W
T
F
S
30
79°
54°
31
80°
53°
1
79°
51°
2
76°
59°
3
67°
63°
4
85°
62°
5
75°
56°
6
71°
51°
7
81°
57°
8
79°
50°
9
66°
63°
10
86°
58°
11
73°
46°
12
72°
55°
13
76°
56°
14
75°
55°
15
73°
50°
16
70°
48°
17
68°
50°
18
68°
50°
19
70°
47°
20
71°
51°
21
63°
51°
22
64°
50°
23
65°
51°
24
69°
50°
25
66°
50°
26
68°
48°
27
63°
45°
28
64°
45°
29
69°
49°
30
70°
49°
1
69°
48°
2
68°
49°
3
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Richmond
Richmond's September 2026 forecast shows daily high temperatures ranging from 63° to 86°, with overnight lows between 45° and 63°. The average high for September is 70° with an average low of 51°. 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 Richmond. See also: October | November | December.