S
M
T
W
T
F
S
26
67°
24°
27
72°
27°
28
58°
38°
29
49°
38°
30
48°
24°
1
47°
23°
2
43°
30°
3
54°
24°
4
69°
48°
5
54°
31°
6
52°
27°
7
48°
28°
8
48°
28°
9
50°
32°
10
53°
31°
11
54°
30°
12
53°
32°
13
57°
38°
14
58°
39°
15
58°
36°
16
57°
37°
17
59°
38°
18
66°
42°
19
61°
41°
20
62°
43°
21
64°
42°
22
58°
36°
23
53°
35°
24
56°
36°
25
56°
36°
26
57°
37°
27
58°
36°
28
58°
36°
29
59°
37°
30
61°
41°
31
60°
44°
1
62°
41°
2
63°
42°
3
66°
47°
4
64°
44°
5
66°
48°
6
71°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Algonquin
South Algonquin's May 2026 forecast shows daily high temperatures ranging from 48° to 71°, with overnight lows between 27° and 49°. The average high for May is 59° with an average low of 38°. 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 South Algonquin. See also: June | July | August.
