S
M
T
W
T
F
S
26
66°
53°
27
71°
49°
28
64°
43°
29
59°
42°
30
58°
39°
1
53°
39°
2
54°
40°
3
60°
42°
4
66°
51°
5
64°
49°
6
63°
48°
7
67°
45°
8
60°
41°
9
60°
40°
10
61°
44°
11
63°
51°
12
70°
51°
13
69°
49°
14
62°
47°
15
62°
44°
16
63°
43°
17
63°
45°
18
62°
44°
19
63°
45°
20
64°
44°
21
65°
45°
22
68°
54°
23
70°
48°
24
69°
46°
25
65°
46°
26
66°
47°
27
67°
48°
28
68°
48°
29
68°
52°
30
69°
52°
31
69°
54°
1
70°
54°
2
73°
55°
3
78°
58°
4
79°
58°
5
83°
59°
6
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Algonquin
Algonquin's May 2026 forecast shows daily high temperatures ranging from 53° to 83°, with overnight lows between 39° and 60°. The average high for May is 66° 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 Algonquin. See also: June | July | August.
