S
M
T
W
T
F
S
26
48°
21°
27
43°
25°
28
55°
32°
29
55°
30°
30
57°
31°
1
69°
43°
2
66°
39°
3
62°
42°
4
65°
34°
5
66°
39°
6
62°
37°
7
61°
36°
8
62°
40°
9
61°
42°
10
76°
47°
11
60°
45°
12
60°
40°
13
61°
41°
14
65°
47°
15
72°
48°
16
74°
50°
17
75°
49°
18
65°
45°
19
70°
50°
20
73°
51°
21
73°
52°
22
72°
50°
23
66°
50°
24
65°
45°
25
73°
51°
26
76°
53°
27
78°
53°
28
78°
52°
29
70°
53°
30
76°
54°
31
78°
55°
1
75°
55°
2
77°
53°
3
69°
54°
4
69°
54°
5
73°
55°
6
69°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Forest Park
Forest Park's May 2026 forecast shows daily high temperatures ranging from 43° to 78°, with overnight lows between 25° and 55°. The average high for May is 68° with an average low of 46°. 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 Forest Park. See also: June | July | August.
