S
M
T
W
T
F
S
26
65°
31°
27
73°
37°
28
69°
46°
29
56°
46°
30
49°
39°
1
53°
31°
2
48°
36°
3
54°
38°
4
67°
45°
5
70°
44°
6
48°
42°
7
53°
37°
8
53°
35°
9
65°
37°
10
57°
39°
11
53°
33°
12
58°
34°
13
56°
44°
14
53°
43°
15
60°
47°
16
70°
45°
17
77°
54°
18
85°
53°
19
81°
64°
20
71°
50°
21
59°
39°
22
67°
35°
23
67°
48°
24
59°
54°
25
72°
51°
26
76°
56°
27
76°
50°
28
68°
47°
29
64°
48°
30
65°
47°
31
67°
49°
1
68°
51°
2
72°
51°
3
69°
53°
4
72°
53°
5
71°
54°
6
75°
50°
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 59° to 76°, with overnight lows between 47° and 56°. The average high for May is 69° with an average low of 51°. 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.
