S
M
T
W
T
F
S
26
74°
45°
27
63°
57°
28
61°
52°
29
59°
43°
30
61°
38°
1
55°
42°
2
58°
38°
3
67°
47°
4
75°
56°
5
60°
43°
6
56°
40°
7
58°
38°
8
61°
44°
9
67°
47°
10
66°
45°
11
70°
50°
12
69°
49°
13
70°
48°
14
63°
42°
15
68°
54°
16
68°
51°
17
71°
58°
18
77°
59°
19
77°
59°
20
76°
60°
21
78°
60°
22
78°
59°
23
75°
55°
24
71°
53°
25
72°
60°
26
76°
60°
27
73°
56°
28
72°
57°
29
72°
53°
30
73°
58°
31
78°
59°
1
74°
62°
2
82°
63°
3
80°
59°
4
74°
55°
5
74°
55°
6
75°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Joseph
St. Joseph's May 2026 forecast shows daily high temperatures ranging from 55° to 82°, with overnight lows between 38° and 63°. The average high for May is 71° with an average low of 53°. 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 St. Joseph. See also: June | July | August.
