S
M
T
W
T
F
S
26
72°
52°
27
68°
46°
28
55°
41°
29
59°
41°
30
55°
37°
1
54°
36°
2
64°
30°
3
75°
50°
4
78°
41°
5
60°
35°
6
54°
37°
7
65°
42°
8
68°
43°
9
70°
45°
10
63°
39°
11
66°
48°
12
69°
47°
13
73°
48°
14
70°
48°
15
73°
53°
16
73°
52°
17
70°
47°
18
74°
51°
19
75°
48°
20
71°
49°
21
68°
44°
22
65°
44°
23
66°
45°
24
67°
45°
25
66°
46°
26
66°
46°
27
67°
47°
28
68°
48°
29
69°
56°
30
72°
55°
31
70°
51°
1
71°
51°
2
74°
55°
3
76°
58°
4
79°
58°
5
79°
60°
6
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Webster City
Webster City's May 2026 forecast shows daily high temperatures ranging from 54° to 79°, with overnight lows between 35° and 60°. The average high for May is 70° with an average low of 48°. 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 City. See also: June | July | August.