S
M
T
W
T
F
S
30
93°
61°
31
90°
53°
1
85°
58°
2
95°
58°
3
97°
65°
4
97°
57°
5
89°
67°
6
88°
71°
7
93°
69°
8
84°
56°
9
82°
52°
10
89°
52°
11
96°
61°
12
73°
47°
13
63°
53°
14
88°
55°
15
71°
52°
16
72°
57°
17
68°
62°
18
75°
58°
19
67°
55°
20
69°
54°
21
70°
53°
22
71°
53°
23
72°
52°
24
75°
57°
25
79°
55°
26
76°
54°
27
77°
51°
28
72°
45°
29
67°
47°
30
66°
51°
1
76°
48°
2
68°
52°
3
76°
48°
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 66° to 79°, with overnight lows between 45° and 62°. The average high for September is 72° 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 Valentine. See also: October | November | December.
