S
M
T
W
T
F
S
26
43°
25°
27
45°
24°
28
43°
26°
29
45°
20°
30
42°
21°
1
44°
22°
2
54°
17°
3
53°
23°
4
52°
33°
5
48°
23°
6
29°
15°
7
47°
29°
8
52°
30°
9
51°
34°
10
47°
35°
11
60°
41°
12
62°
44°
13
65°
45°
14
64°
45°
15
65°
44°
16
61°
41°
17
55°
30°
18
59°
34°
19
55°
25°
20
57°
29°
21
55°
27°
22
56°
33°
23
60°
33°
24
51°
30°
25
51°
27°
26
52°
28°
27
56°
34°
28
53°
34°
29
53°
35°
30
54°
34°
31
53°
33°
1
55°
31°
2
57°
32°
3
59°
32°
4
56°
33°
5
56°
34°
6
58°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Jefferson
Jefferson's May 2026 forecast shows daily high temperatures ranging from 29° to 65°, with overnight lows between 15° and 45°. The average high for May is 55° with an average low of 33°. 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 Jefferson. See also: June | July | August.
