S
M
T
W
T
F
S
26
82°
54°
27
82°
59°
28
81°
63°
29
70°
57°
30
63°
46°
1
66°
43°
2
68°
39°
3
70°
36°
4
81°
48°
5
70°
54°
6
70°
52°
7
68°
45°
8
75°
39°
9
81°
54°
10
84°
52°
11
72°
48°
12
79°
43°
13
81°
52°
14
72°
46°
15
81°
45°
16
86°
64°
17
88°
64°
18
88°
68°
19
90°
70°
20
81°
64°
21
77°
64°
22
77°
66°
23
82°
66°
24
N/A
25
80°
67°
26
79°
67°
27
83°
69°
28
85°
68°
29
81°
69°
30
77°
62°
31
80°
61°
1
81°
63°
2
77°
62°
3
80°
64°
4
82°
63°
5
85°
66°
6
84°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Johnsonville
Johnsonville's May 2026 forecast shows daily high temperatures ranging from 77° to 85°, with overnight lows between 61° and 69°. The average high for May is 81° with an average low of 65°. 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.