S
M
T
W
T
F
S
26
54°
37°
27
52°
37°
28
63°
37°
29
59°
36°
30
48°
39°
1
63°
32°
2
72°
39°
3
75°
54°
4
73°
45°
5
46°
32°
6
41°
32°
7
72°
43°
8
70°
41°
9
77°
48°
10
68°
46°
11
88°
48°
12
77°
57°
13
88°
50°
14
88°
63°
15
82°
55°
16
79°
59°
17
64°
43°
18
43°
37°
19
46°
36°
20
55°
43°
21
66°
41°
22
64°
43°
23
77°
41°
24
83°
51°
25
81°
54°
26
79°
51°
27
67°
50°
28
77°
51°
29
82°
53°
30
81°
53°
31
74°
52°
1
72°
51°
2
77°
54°
3
80°
55°
4
80°
56°
5
81°
56°
6
80°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gunbarrel
Gunbarrel's May 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 49° and 56°. The average high for May is 78° with an average low of 53°. 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 Gunbarrel. See also: June | July | August.