S
M
T
W
T
F
S
26
103°
81°
27
104°
80°
28
104°
80°
29
103°
81°
30
104°
81°
31
104°
80°
1
100°
77°
2
103°
80°
3
104°
81°
4
98°
77°
5
96°
74°
6
96°
76°
7
99°
79°
8
101°
78°
9
102°
79°
10
102°
77°
11
97°
73°
12
96°
72°
13
95°
72°
14
96°
73°
15
97°
74°
16
100°
76°
17
101°
72°
18
97°
73°
19
97°
71°
20
96°
77°
21
99°
76°
22
98°
75°
23
101°
76°
24
102°
73°
25
100°
71°
26
97°
71°
27
96°
72°
28
96°
72°
29
95°
71°
30
95°
71°
31
96°
72°
1
97°
69°
2
94°
69°
3
93°
68°
4
93°
67°
5
92°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Boulder City
Boulder City's August 2026 forecast shows daily high temperatures ranging from 92° to 104°, with overnight lows between 67° and 81°. The average high for August is 99° with an average low of 75°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Boulder City. See also: September | October | November.
