S
M
T
W
T
F
S
26
83°
55°
27
84°
56°
28
85°
56°
29
83°
53°
30
85°
54°
31
Hist. Avg.
81°
53°
1
Hist. Avg.
81°
53°
2
Hist. Avg.
81°
53°
3
Hist. Avg.
80°
52°
4
Hist. Avg.
80°
52°
5
Hist. Avg.
80°
52°
6
Hist. Avg.
80°
52°
7
Hist. Avg.
80°
52°
8
Hist. Avg.
80°
52°
9
Hist. Avg.
80°
52°
10
Hist. Avg.
80°
52°
11
Hist. Avg.
80°
52°
12
Hist. Avg.
80°
52°
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 83° to 85°, with overnight lows between 53° and 56°. The average high for August is 84° with an average low of 55°. 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.
