S
M
T
W
T
F
S
26
105°
80°
27
105°
79°
28
103°
81°
29
103°
77°
30
98°
75°
31
99°
75°
1
98°
79°
2
99°
78°
3
99°
74°
4
98°
74°
5
99°
73°
6
98°
74°
7
99°
75°
8
98°
74°
9
99°
73°
10
100°
73°
11
99°
74°
12
99°
73°
13
98°
73°
14
98°
74°
15
99°
73°
16
98°
78°
17
99°
80°
18
99°
79°
19
100°
81°
20
100°
80°
21
101°
75°
22
98°
71°
23
97°
75°
24
96°
74°
25
95°
75°
26
100°
75°
27
99°
72°
28
96°
71°
29
96°
71°
30
94°
73°
31
Hist. Avg.
96°
76°
1
Hist. Avg.
96°
75°
2
Hist. Avg.
95°
75°
3
Hist. Avg.
95°
75°
4
Hist. Avg.
95°
75°
5
Hist. Avg.
94°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Boulder City
Boulder City's August 2026 forecast shows daily high temperatures ranging from 94° to 105°, with overnight lows between 71° 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.
