S
M
T
W
T
F
S
26
80°
52°
27
80°
62°
28
62°
55°
29
64°
48°
30
66°
42°
1
63°
43°
2
62°
46°
3
78°
45°
4
81°
58°
5
62°
47°
6
60°
45°
7
65°
46°
8
69°
49°
9
74°
57°
10
72°
53°
11
74°
54°
12
73°
54°
13
78°
58°
14
77°
56°
15
78°
57°
16
77°
56°
17
79°
62°
18
76°
62°
19
80°
61°
20
75°
57°
21
78°
55°
22
72°
54°
23
72°
54°
24
73°
56°
25
71°
56°
26
72°
55°
27
74°
56°
28
75°
60°
29
76°
61°
30
79°
66°
31
77°
63°
1
77°
59°
2
78°
60°
3
79°
63°
4
80°
67°
5
82°
68°
6
80°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Webster Groves
Webster Groves's May 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 45° and 68°. The average high for May is 75° with an average low of 57°. 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 Webster Groves. See also: June | July | August.