S
M
T
W
T
F
S
30
85°
64°
31
84°
64°
1
85°
62°
2
79°
58°
3
77°
57°
4
77°
58°
5
78°
55°
6
78°
58°
7
83°
62°
8
83°
62°
9
82°
61°
10
84°
63°
11
84°
62°
12
85°
63°
13
84°
63°
14
83°
59°
15
81°
53°
16
75°
51°
17
74°
52°
18
82°
58°
19
84°
59°
20
83°
59°
21
82°
57°
22
80°
50°
23
72°
52°
24
71°
56°
25
70°
55°
26
79°
55°
27
80°
56°
28
79°
56°
29
77°
55°
30
73°
54°
1
74°
53°
2
78°
47°
3
73°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Culpeper
Culpeper's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 44° and 64°. The average high for September is 79° with an average low of 57°. 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 Culpeper. See also: October | November | December.