S
M
T
W
T
F
S
26
66°
49°
27
68°
49°
28
75°
45°
29
81°
52°
30
85°
55°
1
90°
59°
2
93°
61°
3
77°
53°
4
72°
54°
5
70°
56°
6
79°
49°
7
87°
57°
8
91°
63°
9
91°
60°
10
94°
65°
11
100°
69°
12
101°
66°
13
83°
59°
14
89°
62°
15
92°
61°
16
90°
55°
17
85°
56°
18
86°
53°
19
92°
57°
20
91°
59°
21
93°
57°
22
88°
54°
23
88°
53°
24
85°
54°
25
85°
53°
26
84°
52°
27
78°
48°
28
79°
49°
29
79°
49°
30
83°
52°
31
86°
55°
1
87°
57°
2
88°
58°
3
88°
57°
4
87°
52°
5
82°
54°
6
84°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grapevine
Grapevine's May 2026 forecast shows daily high temperatures ranging from 78° to 93°, with overnight lows between 48° and 62°. The average high for May is 86° with an average low of 55°. 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 Grapevine. See also: June | July | August.
