S
M
T
W
T
F
S
26
57°
16°
27
46°
28°
28
52°
18°
29
55°
21°
30
52°
19°
1
63°
19°
2
72°
43°
3
75°
25°
4
50°
23°
5
45°
25°
6
54°
16°
7
64°
16°
8
72°
34°
9
63°
32°
10
66°
32°
11
84°
45°
12
73°
37°
13
81°
57°
14
78°
48°
15
77°
42°
16
70°
46°
17
56°
40°
18
49°
36°
19
57°
37°
20
61°
40°
21
62°
43°
22
74°
46°
23
78°
50°
24
79°
52°
25
77°
47°
26
70°
45°
27
63°
46°
28
64°
47°
29
64°
45°
30
65°
45°
31
65°
46°
1
66°
52°
2
74°
53°
3
76°
54°
4
77°
55°
5
79°
54°
6
71°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Elgin
Elgin's May 2026 forecast shows daily high temperatures ranging from 49° to 81°, with overnight lows between 36° and 57°. The average high for May is 69° with an average low of 47°. 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 Elgin. See also: June | July | August.
