S
M
T
W
T
F
S
30
92°
66°
31
92°
65°
1
91°
64°
2
91°
65°
3
90°
65°
4
90°
64°
5
89°
65°
6
90°
62°
7
89°
60°
8
79°
60°
9
84°
59°
10
86°
61°
11
88°
60°
12
85°
59°
13
73°
57°
14
73°
57°
15
77°
57°
16
82°
54°
17
75°
50°
18
72°
53°
19
75°
56°
20
80°
55°
21
82°
55°
22
83°
50°
23
80°
53°
24
77°
53°
25
76°
52°
26
80°
44°
27
79°
47°
28
71°
50°
29
78°
50°
30
75°
49°
1
73°
53°
2
76°
53°
3
79°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Valentine
Valentine's September 2026 forecast shows daily high temperatures ranging from 71° to 92°, with overnight lows between 44° and 66°. The average high for September is 81° with an average low of 56°. 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 Valentine. See also: October | November | December.
