S
M
T
W
T
F
S
26
66°
45°
27
65°
48°
28
59°
43°
29
67°
45°
30
67°
50°
1
63°
48°
2
64°
49°
3
65°
48°
4
63°
49°
5
63°
49°
6
62°
48°
7
63°
49°
8
62°
46°
9
62°
49°
10
58°
48°
11
59°
48°
12
61°
47°
13
64°
50°
14
67°
50°
15
67°
51°
16
66°
50°
17
61°
45°
18
63°
50°
19
60°
49°
20
60°
50°
21
61°
51°
22
60°
48°
23
60°
51°
24
63°
52°
25
67°
53°
26
63°
49°
27
62°
49°
28
61°
46°
29
61°
49°
30
62°
48°
31
61°
47°
1
61°
46°
2
66°
51°
3
70°
53°
4
67°
54°
5
64°
54°
6
65°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blaine
Blaine's May 2026 forecast shows daily high temperatures ranging from 58° to 70°, with overnight lows between 43° and 55°. The average high for May is 63° with an average low of 49°. 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 Blaine. See also: June | July | August.