S
M
T
W
T
F
S
26
45°
27°
27
48°
28°
28
52°
27°
29
63°
27°
30
64°
30°
1
68°
27°
2
64°
32°
3
64°
36°
4
46°
36°
5
63°
36°
6
61°
36°
7
66°
32°
8
67°
37°
9
71°
41°
10
72°
41°
11
74°
40°
12
74°
41°
13
71°
42°
14
66°
41°
15
64°
37°
16
62°
38°
17
60°
35°
18
57°
36°
19
60°
31°
20
54°
29°
21
53°
28°
22
54°
30°
23
56°
32°
24
58°
33°
25
62°
33°
26
60°
32°
27
62°
32°
28
60°
33°
29
65°
38°
30
67°
38°
31
68°
39°
1
69°
39°
2
68°
38°
3
67°
37°
4
63°
38°
5
60°
36°
6
59°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Donner
Donner's May 2026 forecast shows daily high temperatures ranging from 53° to 74°, with overnight lows between 28° and 42°. The average high for May is 63° with an average low of 36°. 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 Donner. See also: June | July | August.