S
M
T
W
T
F
S
26
55°
39°
27
59°
40°
28
63°
45°
29
45°
38°
30
48°
35°
1
42°
31°
2
54°
27°
3
68°
36°
4
79°
42°
5
57°
37°
6
52°
30°
7
52°
32°
8
66°
33°
9
64°
36°
10
60°
31°
11
48°
31°
12
73°
31°
13
59°
35°
14
64°
30°
15
70°
55°
16
81°
45°
17
60°
55°
18
77°
62°
19
72°
44°
20
57°
36°
21
55°
40°
22
63°
48°
23
70°
53°
24
67°
53°
25
69°
55°
26
70°
54°
27
71°
54°
28
80°
58°
29
64°
50°
30
63°
49°
31
64°
47°
1
64°
44°
2
65°
45°
3
65°
49°
4
68°
55°
5
76°
57°
6
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Johnsonville
Johnsonville's May 2026 forecast shows daily high temperatures ranging from 55° to 81°, with overnight lows between 36° and 62°. The average high for May is 68° with an average low of 51°. 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 Johnsonville. See also: June | July | August.