S
M
T
W
T
F
S
26
63°
49°
27
56°
37°
28
56°
36°
29
57°
40°
30
56°
38°
1
57°
37°
2
59°
42°
3
60°
44°
4
60°
43°
5
64°
42°
6
57°
37°
7
58°
38°
8
58°
39°
9
59°
39°
10
60°
46°
11
60°
49°
12
61°
43°
13
59°
42°
14
59°
42°
15
61°
44°
16
62°
43°
17
63°
46°
18
62°
43°
19
62°
43°
20
64°
47°
21
64°
51°
22
67°
46°
23
64°
45°
24
64°
45°
25
65°
46°
26
65°
47°
27
66°
47°
28
66°
50°
29
68°
54°
30
68°
51°
31
71°
52°
1
75°
55°
2
77°
59°
3
77°
58°
4
75°
54°
5
79°
58°
6
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cottage Grove
Cottage Grove's May 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 36° and 60°. The average high for May is 64° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Cottage Grove. See also: June | July | August.
