S
M
T
W
T
F
S
26
59°
38°
27
62°
37°
28
65°
47°
29
66°
45°
30
61°
45°
1
62°
48°
2
64°
49°
3
64°
45°
4
62°
39°
5
63°
39°
6
70°
50°
7
74°
47°
8
64°
44°
9
64°
46°
10
65°
47°
11
67°
53°
12
77°
54°
13
76°
53°
14
77°
44°
15
65°
43°
16
67°
51°
17
68°
55°
18
69°
56°
19
71°
51°
20
69°
49°
21
72°
51°
22
77°
56°
23
78°
57°
24
78°
57°
25
79°
55°
26
80°
57°
27
81°
57°
28
82°
53°
29
83°
53°
30
81°
55°
31
84°
51°
1
80°
52°
2
75°
51°
3
74°
51°
4
75°
55°
5
76°
61°
6
83°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fairbury
Fairbury's May 2026 forecast shows daily high temperatures ranging from 59° to 84°, with overnight lows between 37° and 61°. The average high for May is 72° with an average low of 50°. 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 Fairbury. See also: June | July | August.