S
M
T
W
T
F
S
26
84°
56°
27
85°
49°
28
76°
51°
29
82°
56°
30
82°
54°
31
81°
56°
1
83°
57°
2
85°
56°
3
85°
56°
4
84°
57°
5
83°
55°
6
84°
52°
7
82°
48°
8
76°
50°
9
77°
47°
10
76°
46°
11
75°
45°
12
76°
47°
13
Hist. Avg.
80°
51°
14
Hist. Avg.
80°
51°
15
Hist. Avg.
79°
51°
16
Hist. Avg.
79°
51°
17
Hist. Avg.
79°
51°
18
Hist. Avg.
79°
50°
19
Hist. Avg.
79°
50°
20
Hist. Avg.
79°
50°
21
Hist. Avg.
79°
50°
22
Hist. Avg.
79°
50°
23
Hist. Avg.
79°
50°
24
Hist. Avg.
79°
49°
25
Hist. Avg.
78°
49°
26
Hist. Avg.
78°
49°
27
Hist. Avg.
78°
49°
28
Hist. Avg.
78°
48°
29
Hist. Avg.
78°
48°
30
Hist. Avg.
78°
48°
31
Hist. Avg.
78°
48°
1
Hist. Avg.
78°
47°
2
Hist. Avg.
78°
47°
3
Hist. Avg.
77°
47°
4
Hist. Avg.
77°
46°
5
Hist. Avg.
77°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Flagstaff
Flagstaff's August 2026 forecast shows daily high temperatures ranging from 75° to 85°, with overnight lows between 45° and 57°. The average high for August is 81° with an average low of 52°. 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 Flagstaff. See also: September | October | November.
