S
M
T
W
T
F
S
26
68°
54°
27
73°
50°
28
77°
55°
29
81°
59°
30
84°
59°
1
83°
57°
2
86°
61°
3
86°
62°
4
78°
53°
5
73°
56°
6
83°
62°
7
92°
64°
8
95°
66°
9
86°
65°
10
87°
65°
11
88°
66°
12
89°
64°
13
91°
65°
14
86°
62°
15
79°
56°
16
80°
58°
17
80°
57°
18
81°
57°
19
81°
58°
20
80°
58°
21
82°
59°
22
85°
62°
23
90°
60°
24
83°
59°
25
83°
60°
26
84°
61°
27
87°
63°
28
89°
61°
29
90°
63°
30
87°
64°
31
88°
62°
1
86°
63°
2
87°
64°
3
89°
65°
4
92°
66°
5
91°
68°
6
90°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Boulder City
Boulder City's May 2026 forecast shows daily high temperatures ranging from 73° to 95°, with overnight lows between 53° and 68°. The average high for May is 86° 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 Boulder City. See also: June | July | August.
