S
M
T
W
T
F
S
26
59°
42°
27
68°
47°
28
64°
50°
29
57°
40°
30
56°
37°
1
50°
35°
2
57°
32°
3
68°
45°
4
80°
51°
5
61°
46°
6
58°
41°
7
60°
37°
8
67°
38°
9
75°
48°
10
65°
40°
11
56°
42°
12
72°
41°
13
59°
45°
14
67°
42°
15
75°
53°
16
84°
63°
17
85°
70°
18
78°
69°
19
78°
50°
20
62°
45°
21
61°
50°
22
66°
55°
23
70°
55°
24
78°
59°
25
75°
58°
26
75°
57°
27
75°
59°
28
78°
58°
29
79°
61°
30
76°
55°
31
79°
59°
1
77°
61°
2
79°
59°
3
71°
56°
4
71°
54°
5
73°
60°
6
79°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Itasca
Itasca's May 2026 forecast shows daily high temperatures ranging from 61° to 85°, with overnight lows between 45° and 70°. The average high for May is 75° with an average low of 58°. 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 Itasca. See also: June | July | August.