S
M
T
W
T
F
S
26
59°
50°
27
58°
50°
28
59°
48°
29
58°
43°
30
57°
45°
1
57°
50°
2
58°
51°
3
56°
51°
4
59°
51°
5
60°
53°
6
57°
52°
7
56°
52°
8
59°
51°
9
58°
48°
10
61°
53°
11
57°
53°
12
59°
52°
13
62°
50°
14
79°
45°
15
75°
45°
16
66°
36°
17
65°
42°
18
75°
47°
19
82°
48°
20
86°
47°
21
83°
49°
22
81°
46°
23
77°
47°
24
79°
46°
25
78°
47°
26
80°
45°
27
79°
44°
28
74°
42°
29
73°
44°
30
74°
43°
31
80°
49°
1
81°
48°
2
81°
48°
3
79°
46°
4
74°
42°
5
73°
42°
6
75°
43°
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 65° to 86°, with overnight lows between 36° and 49°. The average high for May is 77° with an average low of 45°. 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.
