S
M
T
W
T
F
S
26
74°
45°
27
63°
57°
28
61°
52°
29
59°
43°
30
61°
38°
1
56°
42°
2
55°
38°
3
64°
42°
4
75°
51°
5
57°
47°
6
57°
39°
7
60°
36°
8
64°
47°
9
75°
50°
10
67°
48°
11
67°
45°
12
82°
44°
13
66°
45°
14
69°
40°
15
72°
50°
16
75°
62°
17
84°
62°
18
79°
63°
19
79°
59°
20
68°
48°
21
69°
46°
22
73°
53°
23
79°
57°
24
74°
59°
25
82°
55°
26
81°
57°
27
86°
64°
28
87°
59°
29
85°
55°
30
84°
54°
31
77°
58°
1
82°
55°
2
81°
52°
3
80°
55°
4
81°
60°
5
82°
64°
6
80°
60°
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 77° to 84°, with overnight lows between 52° and 64°. The average high for May is 81° with an average low of 57°. 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.
