S
M
T
W
T
F
S
26
57°
29°
27
58°
25°
28
60°
25°
29
62°
26°
30
63°
29°
1
67°
25°
2
75°
31°
3
77°
34°
4
77°
33°
5
67°
44°
6
68°
27°
7
75°
52°
8
77°
47°
9
72°
41°
10
82°
36°
11
84°
42°
12
89°
45°
13
89°
49°
14
70°
43°
15
68°
36°
16
63°
39°
17
55°
32°
18
60°
30°
19
66°
23°
20
67°
42°
21
62°
32°
22
70°
41°
23
79°
49°
24
78°
51°
25
81°
54°
26
73°
42°
27
62°
43°
28
72°
50°
29
76°
49°
30
79°
51°
31
78°
49°
1
78°
51°
2
72°
48°
3
75°
49°
4
77°
53°
5
76°
53°
6
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blackfoot
Blackfoot's May 2026 forecast shows daily high temperatures ranging from 62° to 81°, with overnight lows between 32° and 54°. The average high for May is 73° with an average low of 47°. 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 Blackfoot. See also: June | July | August.
