S
M
T
W
T
F
S
26
84°
62°
27
84°
72°
28
85°
72°
29
74°
59°
30
66°
57°
1
61°
47°
2
73°
44°
3
79°
53°
4
78°
61°
5
81°
64°
6
70°
51°
7
77°
50°
8
76°
56°
9
81°
58°
10
81°
60°
11
82°
62°
12
83°
59°
13
82°
58°
14
73°
55°
15
85°
65°
16
85°
64°
17
86°
65°
18
86°
65°
19
85°
66°
20
86°
66°
21
83°
65°
22
83°
66°
23
81°
66°
24
86°
67°
25
86°
67°
26
82°
64°
27
82°
60°
28
84°
65°
29
88°
67°
30
89°
66°
31
89°
67°
1
88°
68°
2
89°
68°
3
90°
69°
4
90°
68°
5
86°
66°
6
84°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dumas City
Dumas City's May 2026 forecast shows daily high temperatures ranging from 61° to 90°, with overnight lows between 44° and 69°. The average high for May is 82° with an average low of 62°. 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 Dumas City. See also: June | July | August.