S
M
T
W
T
F
S
26
85°
59°
27
84°
57°
28
79°
54°
29
76°
53°
30
76°
53°
31
79°
54°
1
84°
56°
2
85°
56°
3
79°
50°
4
78°
50°
5
83°
52°
6
85°
53°
7
78°
51°
8
79°
50°
9
78°
58°
10
85°
60°
11
87°
60°
12
87°
59°
13
86°
58°
14
87°
58°
15
87°
57°
16
86°
51°
17
85°
53°
18
82°
55°
19
77°
49°
20
76°
51°
21
76°
48°
22
75°
46°
23
75°
49°
24
79°
52°
25
83°
55°
26
84°
56°
27
84°
55°
28
85°
57°
29
84°
57°
30
83°
56°
31
83°
56°
1
82°
53°
2
82°
50°
3
80°
50°
4
78°
52°
5
76°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Stevenson
Stevenson's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 45° and 60°. The average high for August is 81° with an average low of 54°. 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 Stevenson. See also: September | October | November.