S
M
T
W
T
F
S
26
67°
34°
27
61°
37°
28
65°
39°
29
68°
43°
30
76°
49°
1
67°
45°
2
71°
50°
3
83°
49°
4
71°
47°
5
72°
45°
6
69°
44°
7
72°
46°
8
70°
47°
9
70°
46°
10
68°
46°
11
67°
43°
12
63°
41°
13
70°
46°
14
71°
47°
15
71°
47°
16
70°
45°
17
63°
40°
18
68°
44°
19
63°
40°
20
64°
45°
21
63°
44°
22
63°
40°
23
64°
41°
24
72°
47°
25
72°
46°
26
70°
43°
27
67°
44°
28
64°
41°
29
65°
41°
30
64°
42°
31
63°
41°
1
64°
41°
2
73°
47°
3
73°
46°
4
66°
50°
5
65°
43°
6
66°
46°
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 63° to 83°, with overnight lows between 39° and 50°. The average high for May is 68° with an average low of 44°. 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.
