S
M
T
W
T
F
S
30
90°
75°
31
92°
75°
1
98°
78°
2
94°
73°
3
99°
72°
4
96°
71°
5
87°
63°
6
84°
62°
7
82°
63°
8
87°
62°
9
88°
64°
10
94°
66°
11
88°
63°
12
87°
66°
13
86°
65°
14
86°
63°
15
82°
59°
16
76°
64°
17
76°
60°
18
75°
59°
19
76°
56°
20
80°
61°
21
78°
62°
22
80°
62°
23
80°
61°
24
76°
60°
25
77°
61°
26
80°
61°
27
80°
60°
28
79°
55°
29
71°
51°
30
72°
54°
1
73°
57°
2
74°
56°
3
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fredericksburg
Fredericksburg's September 2026 forecast shows daily high temperatures ranging from 69° to 99°, with overnight lows between 51° and 73°. The average high for September is 82° with an average low of 61°. 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 Fredericksburg. See also: October | November | December.
