S
M
T
W
T
F
S
26
78°
49°
27
73°
55°
28
61°
50°
29
60°
45°
30
63°
38°
1
59°
37°
2
60°
40°
3
72°
41°
4
78°
53°
5
60°
44°
6
57°
42°
7
66°
48°
8
68°
48°
9
76°
53°
10
67°
43°
11
64°
43°
12
70°
50°
13
74°
51°
14
78°
55°
15
78°
55°
16
77°
54°
17
71°
54°
18
75°
53°
19
76°
56°
20
73°
54°
21
73°
50°
22
68°
49°
23
69°
50°
24
70°
51°
25
70°
51°
26
71°
52°
27
71°
51°
28
72°
56°
29
73°
58°
30
77°
62°
31
73°
58°
1
73°
54°
2
76°
57°
3
77°
60°
4
79°
63°
5
78°
64°
6
77°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Spring Valley
Spring Valley's May 2026 forecast shows daily high temperatures ranging from 57° to 79°, with overnight lows between 42° and 64°. The average high for May 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 May weather will actually feel in Spring Valley. See also: June | July | August.