S
M
T
W
T
F
S
26
59°
39°
27
71°
36°
28
55°
49°
29
54°
42°
30
45°
35°
1
42°
31°
2
42°
30°
3
55°
30°
4
71°
42°
5
68°
50°
6
50°
40°
7
50°
33°
8
52°
32°
9
59°
44°
10
56°
39°
11
50°
32°
12
61°
32°
13
61°
39°
14
44°
39°
15
64°
40°
16
72°
43°
17
82°
54°
18
87°
56°
19
82°
64°
20
66°
46°
21
58°
42°
22
62°
37°
23
54°
45°
24
60°
46°
25
70°
52°
26
81°
44°
27
77°
47°
28
62°
43°
29
68°
38°
30
60°
41°
31
66°
45°
1
62°
43°
2
70°
48°
3
73°
50°
4
73°
50°
5
71°
52°
6
71°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Great Valley
Great Valley's May 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 38° and 53°. The average high for May is 68° with an average low of 46°. 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 Great Valley. See also: June | July | August.
