S
M
T
W
T
F
S
26
86°
45°
27
88°
46°
28
84°
48°
29
86°
46°
30
86°
46°
31
93°
48°
1
82°
50°
2
77°
39°
3
81°
39°
4
88°
43°
5
95°
45°
6
97°
48°
7
97°
54°
8
91°
46°
9
90°
45°
10
88°
43°
11
86°
43°
12
82°
48°
13
84°
46°
14
84°
50°
15
84°
52°
16
88°
54°
17
88°
54°
18
91°
48°
19
93°
45°
20
95°
50°
21
91°
61°
22
88°
48°
23
83°
45°
24
88°
43°
25
93°
46°
26
90°
48°
27
83°
54°
28
81°
43°
29
68°
41°
30
77°
36°
31
86°
36°
1
81°
47°
2
63°
45°
3
61°
41°
4
57°
39°
5
66°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fossil
Fossil's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Fossil. See also: September | October | November.