S
M
T
W
T
F
S
26
74°
38°
27
73°
34°
28
69°
35°
29
65°
34°
30
46°
37°
1
56°
37°
2
67°
35°
3
76°
43°
4
75°
48°
5
56°
35°
6
38°
31°
7
46°
32°
8
74°
40°
9
80°
47°
10
66°
45°
11
85°
41°
12
87°
61°
13
89°
46°
14
89°
58°
15
86°
48°
16
89°
52°
17
87°
55°
18
72°
32°
19
63°
38°
20
63°
41°
21
66°
40°
22
69°
42°
23
75°
45°
24
79°
46°
25
74°
47°
26
71°
46°
27
75°
47°
28
79°
48°
29
79°
52°
30
77°
51°
31
76°
44°
1
77°
49°
2
75°
47°
3
70°
41°
4
72°
49°
5
77°
49°
6
80°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Jansen
Jansen's May 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 32° and 52°. The average high for May is 73° with an average low of 45°. 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 Jansen. See also: June | July | August.
