S
M
T
W
T
F
S
26
48°
39°
27
46°
39°
28
50°
34°
29
57°
30°
30
52°
28°
1
54°
28°
2
70°
34°
3
70°
41°
4
61°
36°
5
48°
32°
6
45°
28°
7
61°
28°
8
73°
37°
9
59°
41°
10
59°
37°
11
73°
32°
12
72°
46°
13
75°
39°
14
79°
52°
15
84°
46°
16
75°
45°
17
73°
50°
18
55°
45°
19
48°
39°
20
63°
34°
21
70°
41°
22
54°
48°
23
64°
50°
24
84°
48°
25
93°
55°
26
90°
61°
27
93°
64°
28
91°
68°
29
87°
63°
30
81°
61°
31
74°
62°
1
83°
61°
2
82°
61°
3
81°
59°
4
80°
57°
5
77°
56°
6
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Donnelly
Donnelly's May 2026 forecast shows daily high temperatures ranging from 74° to 91°, with overnight lows between 56° and 68°. The average high for May is 82° with an average low of 61°. 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 Donnelly. See also: June | July | August.