S
M
T
W
T
F
S
26
84°
72°
27
85°
73°
28
84°
74°
29
85°
73°
30
83°
69°
1
71°
57°
2
71°
54°
3
73°
54°
4
74°
59°
5
80°
62°
6
83°
72°
7
78°
68°
8
82°
67°
9
78°
64°
10
80°
67°
11
79°
66°
12
80°
66°
13
81°
66°
14
87°
65°
15
83°
68°
16
82°
69°
17
83°
73°
18
85°
75°
19
86°
77°
20
83°
71°
21
81°
71°
22
85°
71°
23
75°
68°
24
74°
69°
25
81°
71°
26
84°
71°
27
83°
74°
28
84°
74°
29
84°
73°
30
88°
74°
31
88°
74°
1
88°
73°
2
86°
73°
3
87°
74°
4
86°
76°
5
87°
75°
6
88°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Stephenville
Stephenville's May 2026 forecast shows daily high temperatures ranging from 84° to 88°, with overnight lows between 73° and 77°. The average high for May is 87° with an average low of 74°. 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 Stephenville. See also: June | July | August.