S
M
T
W
T
F
S
26
101°
73°
27
103°
75°
28
104°
76°
29
104°
75°
30
105°
76°
31
107°
78°
1
107°
79°
2
106°
79°
3
107°
78°
4
106°
77°
5
105°
75°
6
104°
76°
7
105°
77°
8
106°
78°
9
105°
77°
10
105°
74°
11
104°
71°
12
103°
71°
13
102°
73°
14
102°
77°
15
101°
78°
16
103°
77°
17
106°
77°
18
107°
76°
19
104°
77°
20
105°
76°
21
105°
76°
22
104°
75°
23
105°
75°
24
104°
74°
25
102°
76°
26
102°
75°
27
101°
74°
28
101°
71°
29
99°
70°
30
97°
71°
31
98°
69°
1
99°
68°
2
98°
67°
3
96°
65°
4
94°
66°
5
93°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Irwin
Fort Irwin's August 2026 forecast shows daily high temperatures ranging from 93° to 107°, with overnight lows between 65° and 79°. The average high for August is 103° 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 Fort Irwin. See also: September | October | November.
