S
M
T
W
T
F
S
26
71°
36°
27
72°
37°
28
72°
36°
29
71°
37°
30
72°
38°
1
73°
38°
2
74°
40°
3
74°
40°
4
73°
39°
5
67°
39°
6
64°
38°
7
66°
40°
8
66°
39°
9
69°
40°
10
66°
40°
11
67°
39°
12
72°
40°
13
74°
41°
14
75°
42°
15
78°
36°
16
77°
39°
17
79°
32°
18
73°
34°
19
77°
39°
20
81°
37°
21
79°
37°
22
78°
34°
23
77°
34°
24
79°
40°
25
83°
41°
26
83°
42°
27
81°
37°
28
78°
36°
29
76°
35°
30
78°
38°
31
80°
41°
1
84°
43°
2
87°
45°
3
88°
45°
4
87°
46°
5
86°
48°
6
87°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gallup
Gallup's May 2026 forecast shows daily high temperatures ranging from 64° to 88°, with overnight lows between 32° and 48°. The average high for May is 76° with an average low of 39°. 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 Gallup. See also: June | July | August.
