S
M
T
W
T
F
S
26
81°
67°
27
84°
67°
28
86°
66°
29
79°
59°
30
85°
67°
31
86°
66°
1
81°
68°
2
86°
66°
3
86°
69°
4
87°
68°
5
88°
67°
6
86°
64°
7
86°
66°
8
85°
60°
9
85°
58°
10
77°
57°
11
78°
57°
12
78°
58°
13
79°
58°
14
77°
63°
15
77°
65°
16
80°
64°
17
77°
65°
18
79°
66°
19
82°
66°
20
84°
65°
21
84°
65°
22
76°
61°
23
78°
57°
24
Hist. Avg.
80°
61°
25
Hist. Avg.
79°
61°
26
Hist. Avg.
79°
61°
27
Hist. Avg.
79°
60°
28
Hist. Avg.
79°
60°
29
Hist. Avg.
78°
60°
30
Hist. Avg.
78°
60°
31
Hist. Avg.
78°
59°
1
Hist. Avg.
77°
59°
2
Hist. Avg.
77°
59°
3
Hist. Avg.
77°
58°
4
Hist. Avg.
76°
58°
5
Hist. Avg.
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Cottage Grove
Cottage Grove's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 57° and 69°. The average high for August is 82° with an average low of 64°. 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 Cottage Grove. See also: September | October | November.
