S
M
T
W
T
F
S
26
58°
46°
27
70°
45°
28
63°
50°
29
62°
54°
30
70°
49°
1
67°
44°
2
63°
49°
3
64°
44°
4
77°
51°
5
86°
61°
6
71°
59°
7
63°
51°
8
74°
48°
9
76°
59°
10
82°
55°
11
64°
49°
12
71°
46°
13
77°
57°
14
63°
52°
15
73°
52°
16
85°
54°
17
89°
64°
18
93°
67°
19
99°
71°
20
98°
65°
21
69°
56°
22
60°
53°
23
61°
55°
24
73°
64°
25
79°
65°
26
77°
66°
27
80°
63°
28
79°
64°
29
78°
62°
30
78°
62°
31
83°
66°
1
86°
62°
2
80°
66°
3
77°
66°
4
80°
65°
5
78°
63°
6
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mt. Vernon Triangle
Mt. Vernon Triangle's May 2026 forecast shows daily high temperatures ranging from 60° to 99°, with overnight lows between 53° and 71°. The average high for May is 79° with an average low of 63°. 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 Mt. Vernon Triangle. See also: June | July | August.
