S
M
T
W
T
F
S
26
111°
88°
27
111°
88°
28
108°
82°
29
108°
86°
30
109°
79°
31
111°
79°
1
115°
82°
2
113°
88°
3
112°
85°
4
110°
86°
5
110°
85°
6
108°
84°
7
108°
86°
8
110°
85°
9
106°
84°
10
101°
80°
11
102°
80°
12
101°
79°
13
99°
79°
14
101°
76°
15
100°
75°
16
93°
72°
17
96°
74°
18
95°
72°
19
94°
72°
20
94°
73°
21
95°
71°
22
96°
73°
23
101°
75°
24
101°
77°
25
100°
77°
26
100°
76°
27
99°
78°
28
100°
74°
29
93°
70°
30
90°
69°
31
91°
71°
1
92°
69°
2
91°
68°
3
90°
68°
4
90°
69°
5
89°
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 89° to 113°, with overnight lows between 67° and 88°. The average high for August is 99° with an average low of 76°. 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.
