S
M
T
W
T
F
S
30
87°
63°
31
89°
62°
1
81°
63°
2
81°
66°
3
82°
67°
4
85°
65°
5
86°
62°
6
84°
65°
7
86°
61°
8
84°
60°
9
84°
64°
10
80°
65°
11
86°
60°
12
80°
59°
13
79°
59°
14
80°
60°
15
81°
61°
16
84°
62°
17
83°
59°
18
79°
56°
19
78°
58°
20
78°
61°
21
79°
56°
22
78°
58°
23
82°
60°
24
81°
60°
25
82°
62°
26
81°
55°
27
81°
55°
28
75°
54°
29
76°
54°
30
75°
53°
1
Hist. Avg.
76°
51°
2
Hist. Avg.
75°
51°
3
Hist. Avg.
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Valentines
Valentines's September 2026 forecast shows daily high temperatures ranging from 75° to 89°, with overnight lows between 53° and 67°. The average high for September is 81° with an average low of 60°. 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 Valentines. See also: October | November | December.