S
M
T
W
T
F
S
26
65°
46°
27
60°
42°
28
58°
42°
29
55°
38°
30
53°
35°
1
55°
39°
2
66°
40°
3
71°
47°
4
64°
45°
5
53°
38°
6
46°
32°
7
58°
32°
8
73°
39°
9
62°
47°
10
61°
40°
11
69°
39°
12
71°
52°
13
72°
45°
14
80°
48°
15
89°
59°
16
81°
55°
17
71°
55°
18
69°
49°
19
55°
41°
20
62°
47°
21
64°
49°
22
62°
51°
23
67°
53°
24
81°
60°
25
82°
58°
26
81°
59°
27
81°
61°
28
77°
58°
29
74°
58°
30
77°
60°
31
80°
56°
1
78°
59°
2
70°
59°
3
70°
56°
4
72°
57°
5
77°
61°
6
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South St. Paul
South St. Paul's May 2026 forecast shows daily high temperatures ranging from 55° to 82°, with overnight lows between 41° and 61°. The average high for May is 73° with an average low of 56°. 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 South St. Paul. See also: June | July | August.