S
M
T
W
T
F
S
26
106°
80°
27
109°
80°
28
108°
77°
29
109°
74°
30
108°
75°
31
111°
73°
1
113°
78°
2
114°
80°
3
112°
81°
4
111°
78°
5
112°
79°
6
111°
80°
7
110°
82°
8
110°
81°
9
111°
79°
10
105°
78°
11
102°
74°
12
101°
75°
13
101°
72°
14
102°
72°
15
100°
71°
16
102°
73°
17
101°
72°
18
99°
73°
19
99°
74°
20
100°
72°
21
101°
73°
22
102°
73°
23
102°
74°
24
103°
73°
25
102°
73°
26
102°
72°
27
101°
73°
28
100°
72°
29
101°
73°
30
99°
72°
31
99°
72°
1
98°
71°
2
100°
71°
3
97°
70°
4
94°
71°
5
92°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Barstow
Barstow's August 2026 forecast shows daily high temperatures ranging from 92° to 112°, with overnight lows between 69° and 82°. The average high for August is 102° with an average low of 74°. 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 Barstow. See also: September | October | November.
