S
M
T
W
T
F
S
26
57°
42°
27
62°
35°
28
71°
36°
29
75°
41°
30
75°
41°
1
75°
41°
2
76°
41°
3
77°
54°
4
67°
52°
5
63°
46°
6
73°
39°
7
80°
44°
8
86°
49°
9
87°
55°
10
89°
53°
11
91°
56°
12
90°
56°
13
83°
59°
14
82°
49°
15
84°
50°
16
79°
54°
17
74°
54°
18
70°
48°
19
76°
49°
20
80°
52°
21
82°
52°
22
83°
55°
23
84°
54°
24
84°
55°
25
84°
57°
26
81°
53°
27
79°
54°
28
83°
53°
29
85°
54°
30
85°
54°
31
86°
56°
1
87°
51°
2
88°
56°
3
89°
57°
4
89°
57°
5
88°
58°
6
89°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dewey-Humboldt
Dewey-Humboldt's May 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 49° and 58°. The average high for May is 84° with an average low of 54°. 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 Dewey-Humboldt. See also: June | July | August.