S
M
T
W
T
F
S
26
55°
35°
27
67°
37°
28
63°
48°
29
63°
46°
30
60°
41°
1
63°
48°
2
61°
44°
3
59°
45°
4
76°
43°
5
84°
61°
6
70°
50°
7
60°
46°
8
63°
48°
9
62°
48°
10
72°
56°
11
67°
48°
12
66°
49°
13
69°
52°
14
71°
54°
15
73°
56°
16
75°
55°
17
73°
54°
18
70°
51°
19
74°
55°
20
74°
56°
21
73°
55°
22
73°
49°
23
69°
48°
24
67°
51°
25
68°
49°
26
69°
52°
27
69°
50°
28
70°
52°
29
70°
50°
30
69°
51°
31
71°
59°
1
76°
59°
2
72°
54°
3
72°
58°
4
77°
60°
5
75°
58°
6
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Jerseyville
Jerseyville's May 2026 forecast shows daily high temperatures ranging from 60° to 84°, with overnight lows between 46° and 61°. 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 Jerseyville. See also: June | July | August.