S
M
T
W
T
F
S
26
62°
48°
27
68°
41°
28
74°
39°
29
78°
45°
30
79°
46°
1
80°
51°
2
83°
50°
3
86°
56°
4
69°
53°
5
67°
47°
6
80°
46°
7
86°
48°
8
93°
57°
9
94°
60°
10
96°
62°
11
97°
63°
12
98°
64°
13
82°
64°
14
90°
61°
15
90°
61°
16
86°
58°
17
83°
46°
18
75°
45°
19
81°
51°
20
88°
51°
21
91°
55°
22
90°
54°
23
88°
57°
24
86°
56°
25
86°
54°
26
88°
54°
27
87°
55°
28
87°
56°
29
89°
54°
30
82°
49°
31
83°
52°
1
89°
56°
2
93°
59°
3
93°
60°
4
94°
61°
5
94°
61°
6
93°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Valentine
Valentine's May 2026 forecast shows daily high temperatures ranging from 75° to 94°, with overnight lows between 45° and 61°. The average high for May is 88° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Valentine. See also: June | July | August.