S
M
T
W
T
F
S
26
73°
55°
27
72°
52°
28
65°
50°
29
82°
59°
30
75°
61°
1
64°
54°
2
61°
41°
3
70°
36°
4
81°
43°
5
81°
57°
6
79°
63°
7
79°
54°
8
72°
46°
9
73°
50°
10
82°
55°
11
70°
52°
12
73°
45°
13
81°
43°
14
73°
46°
15
75°
41°
16
84°
48°
17
91°
64°
18
90°
64°
19
90°
66°
20
92°
68°
21
87°
61°
22
70°
60°
23
79°
63°
24
79°
65°
25
80°
66°
26
80°
65°
27
82°
62°
28
80°
62°
29
82°
59°
30
81°
60°
31
84°
63°
1
85°
64°
2
86°
65°
3
86°
64°
4
80°
64°
5
81°
63°
6
84°
65°
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 70° to 92°, with overnight lows between 59° and 68°. The average high for May is 83° with an average low of 63°. 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.
