S
M
T
W
T
F
S
26
46°
29°
27
34°
27°
28
51°
29°
29
55°
25°
30
56°
22°
1
64°
28°
2
74°
37°
3
71°
38°
4
52°
37°
5
47°
15°
6
55°
15°
7
61°
43°
8
69°
42°
9
62°
38°
10
72°
39°
11
85°
45°
12
72°
39°
13
94°
50°
14
75°
38°
15
73°
31°
16
74°
30°
17
56°
39°
18
43°
28°
19
59°
22°
20
69°
36°
21
46°
38°
22
64°
35°
23
74°
38°
24
83°
39°
25
87°
44°
26
88°
53°
27
84°
58°
28
83°
56°
29
88°
55°
30
80°
52°
31
67°
45°
1
81°
37°
2
85°
39°
3
80°
52°
4
82°
48°
5
90°
45°
6
100°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gillette
Gillette's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Gillette. See also: June | July | August.