S
M
T
W
T
F
S
26
52°
41°
27
66°
37°
28
63°
37°
29
68°
46°
30
68°
48°
1
63°
48°
2
57°
45°
3
59°
41°
4
73°
43°
5
79°
61°
6
70°
61°
7
61°
48°
8
68°
53°
9
70°
51°
10
79°
56°
11
62°
46°
12
64°
46°
13
66°
52°
14
65°
50°
15
70°
53°
16
75°
56°
17
72°
54°
18
79°
60°
19
76°
58°
20
74°
55°
21
69°
51°
22
70°
51°
23
71°
52°
24
72°
51°
25
73°
55°
26
76°
57°
27
75°
56°
28
77°
56°
29
76°
53°
30
78°
59°
31
82°
61°
1
77°
61°
2
81°
59°
3
80°
61°
4
83°
62°
5
83°
62°
6
82°
61°
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 61° to 83°, with overnight lows between 46° and 62°. The average high for May is 74° with an average low of 55°. 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.
