S
M
T
W
T
F
S
26
67°
38°
27
73°
37°
28
69°
48°
29
58°
44°
30
50°
38°
1
53°
30°
2
50°
36°
3
59°
36°
4
70°
44°
5
72°
47°
6
54°
43°
7
54°
36°
8
55°
40°
9
67°
32°
10
54°
38°
11
54°
32°
12
56°
32°
13
49°
45°
14
58°
46°
15
67°
47°
16
71°
51°
17
68°
44°
18
69°
58°
19
80°
57°
20
67°
40°
21
61°
42°
22
65°
44°
23
63°
45°
24
65°
47°
25
67°
48°
26
68°
46°
27
67°
46°
28
64°
49°
29
68°
51°
30
65°
51°
31
70°
48°
1
64°
46°
2
64°
46°
3
65°
44°
4
68°
47°
5
68°
53°
6
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Caldwell
Caldwell's May 2026 forecast shows daily high temperatures ranging from 49° to 80°, with overnight lows between 40° and 58°. The average high for May is 66° with an average low of 48°. 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 Caldwell. See also: June | July | August.
