S
M
T
W
T
F
S
30
90°
66°
31
88°
67°
1
96°
71°
2
96°
71°
3
90°
70°
4
94°
68°
5
82°
66°
6
83°
63°
7
83°
59°
8
87°
56°
9
90°
60°
10
91°
69°
11
82°
70°
12
82°
68°
13
89°
72°
14
81°
61°
15
79°
53°
16
86°
56°
17
93°
64°
18
87°
68°
19
83°
64°
20
86°
68°
21
72°
63°
22
66°
55°
23
61°
54°
24
62°
50°
25
69°
48°
26
72°
49°
27
72°
48°
28
68°
47°
29
70°
50°
30
73°
51°
1
73°
50°
2
70°
49°
3
70°
55°
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 61° to 86°, with overnight lows between 47° and 68°. The average high for September is 70° with an average low of 53°. 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.