S
M
T
W
T
F
S
26
68°
51°
27
66°
47°
28
60°
41°
29
62°
39°
30
66°
38°
1
67°
32°
2
67°
30°
3
81°
47°
4
85°
45°
5
60°
47°
6
61°
43°
7
76°
36°
8
73°
46°
9
83°
42°
10
72°
45°
11
82°
39°
12
87°
54°
13
81°
41°
14
84°
55°
15
94°
59°
16
93°
62°
17
91°
61°
18
88°
52°
19
62°
49°
20
67°
43°
21
64°
54°
22
76°
61°
23
76°
49°
24
81°
58°
25
85°
59°
26
83°
61°
27
80°
63°
28
75°
62°
29
74°
58°
30
76°
57°
31
77°
54°
1
78°
55°
2
76°
55°
3
76°
56°
4
80°
58°
5
81°
61°
6
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fostoria
Fostoria's May 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 54° and 63°. The average high for May is 79° with an average low of 58°. 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 Fostoria. See also: June | July | August.
