S
M
T
W
T
F
S
30
90°
64°
31
N/A
1
94°
72°
2
93°
74°
3
98°
74°
4
92°
71°
5
84°
65°
6
82°
63°
7
83°
64°
8
84°
63°
9
85°
64°
10
86°
64°
11
84°
63°
12
81°
63°
13
82°
60°
14
81°
61°
15
80°
65°
16
76°
64°
17
76°
61°
18
76°
57°
19
75°
56°
20
75°
57°
21
77°
59°
22
80°
60°
23
82°
63°
24
82°
62°
25
81°
61°
26
79°
61°
27
78°
62°
28
78°
61°
29
81°
60°
30
76°
59°
1
72°
57°
2
73°
59°
3
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montross
Montross's September 2026 forecast shows daily high temperatures ranging from 72° to 98°, with overnight lows between 56° and 74°. The average high for September is 81° with an average low of 63°. 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 Montross. See also: October | November | December.