S
M
T
W
T
F
S
26
59°
41°
27
70°
36°
28
61°
38°
29
63°
48°
30
64°
48°
1
64°
38°
2
60°
45°
3
61°
41°
4
73°
37°
5
82°
51°
6
69°
52°
7
65°
50°
8
66°
41°
9
60°
48°
10
74°
49°
11
62°
45°
12
67°
36°
13
73°
53°
14
63°
50°
15
66°
48°
16
81°
43°
17
87°
60°
18
96°
68°
19
97°
69°
20
92°
52°
21
66°
52°
22
62°
49°
23
70°
59°
24
71°
59°
25
78°
57°
26
77°
56°
27
76°
58°
28
79°
58°
29
80°
59°
30
79°
58°
31
84°
56°
1
81°
60°
2
78°
60°
3
74°
61°
4
76°
61°
5
78°
58°
6
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Valley Forge
Valley Forge's May 2026 forecast shows daily high temperatures ranging from 62° to 97°, with overnight lows between 49° and 69°. The average high for May is 79° with an average low of 59°. 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 Valley Forge. See also: June | July | August.
