S
M
T
W
T
F
S
26
99°
74°
27
101°
75°
28
103°
77°
29
102°
78°
30
100°
77°
31
99°
78°
1
100°
79°
2
99°
79°
3
101°
78°
4
100°
78°
5
98°
76°
6
99°
77°
7
99°
79°
8
101°
79°
9
100°
78°
10
100°
78°
11
101°
75°
12
98°
75°
13
101°
77°
14
100°
73°
15
95°
77°
16
96°
80°
17
101°
80°
18
103°
78°
19
102°
79°
20
100°
77°
21
102°
78°
22
102°
78°
23
101°
79°
24
102°
74°
25
95°
75°
26
99°
75°
27
98°
74°
28
97°
73°
29
97°
72°
30
93°
73°
31
93°
71°
1
95°
72°
2
94°
71°
3
93°
68°
4
92°
69°
5
91°
68°
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 91° to 103°, with overnight lows between 68° and 80°. 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.
