S
M
T
W
T
F
S
26
58°
42°
27
73°
42°
28
70°
48°
29
55°
44°
30
51°
35°
1
45°
34°
2
45°
35°
3
61°
32°
4
73°
58°
5
65°
45°
6
50°
40°
7
51°
40°
8
60°
42°
9
56°
43°
10
59°
48°
11
58°
41°
12
57°
44°
13
61°
49°
14
59°
46°
15
59°
47°
16
65°
50°
17
67°
47°
18
70°
51°
19
65°
51°
20
72°
52°
21
71°
51°
22
65°
44°
23
62°
44°
24
64°
45°
25
63°
47°
26
64°
47°
27
64°
46°
28
65°
46°
29
65°
47°
30
66°
49°
31
71°
54°
1
67°
51°
2
68°
52°
3
71°
56°
4
72°
56°
5
72°
57°
6
77°
58°
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 50° to 77°, with overnight lows between 40° and 58°. The average high for May is 65° with an average low of 48°. 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.
