S
M
T
W
T
F
S
26
98°
74°
27
101°
75°
28
90°
68°
29
92°
70°
30
90°
72°
31
75°
64°
1
86°
65°
2
85°
65°
3
86°
67°
4
77°
63°
5
81°
58°
6
82°
58°
7
81°
64°
8
82°
59°
9
87°
67°
10
86°
69°
11
89°
71°
12
89°
71°
13
80°
71°
14
82°
66°
15
82°
68°
16
82°
67°
17
85°
61°
18
85°
65°
19
81°
56°
20
81°
58°
21
83°
67°
22
80°
62°
23
81°
54°
24
82°
64°
25
84°
63°
26
78°
59°
27
83°
56°
28
84°
65°
29
81°
66°
30
84°
67°
31
78°
60°
1
78°
60°
2
79°
61°
3
80°
60°
4
78°
58°
5
76°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cottage Grove
Cottage Grove's August 2026 forecast shows daily high temperatures ranging from 76° to 84°, with overnight lows between 56° and 67°. The average high for August is 80° with an average low of 62°. 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.
