S
M
T
W
T
F
S
26
83°
62°
27
83°
65°
28
83°
62°
29
78°
60°
30
77°
60°
31
80°
65°
1
81°
65°
2
84°
66°
3
83°
65°
4
84°
63°
5
78°
63°
6
79°
65°
7
85°
64°
8
77°
65°
9
83°
64°
10
77°
61°
11
79°
63°
12
80°
65°
13
83°
62°
14
77°
57°
15
76°
57°
16
78°
63°
17
76°
62°
18
79°
63°
19
82°
62°
20
83°
63°
21
83°
59°
22
75°
56°
23
80°
63°
24
78°
60°
25
83°
62°
26
83°
59°
27
80°
53°
28
74°
52°
29
71°
51°
30
74°
54°
31
77°
59°
1
73°
60°
2
80°
52°
3
74°
49°
4
70°
50°
5
70°
49°
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 70° to 85°, with overnight lows between 49° and 66°. The average high for August is 79° with an average low of 60°. 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.
