S
M
T
W
T
F
S
27
66°
46°
28
70°
39°
29
75°
54°
30
81°
59°
1
82°
59°
2
82°
68°
3
82°
68°
4
70°
66°
5
75°
64°
6
75°
59°
7
73°
55°
8
79°
54°
9
66°
54°
10
70°
50°
11
81°
50°
12
79°
54°
13
68°
63°
14
79°
64°
15
79°
64°
16
86°
66°
17
84°
70°
18
77°
68°
19
75°
63°
20
66°
54°
21
59°
55°
22
64°
55°
23
68°
54°
24
70°
52°
25
70°
50°
26
70°
54°
27
70°
50°
28
63°
55°
29
70°
59°
30
77°
63°
31
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Algonquin
Algonquin's May 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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.