S
M
T
W
T
F
S
26
61°
41°
27
71°
35°
28
60°
39°
29
62°
48°
30
61°
45°
1
63°
36°
2
59°
44°
3
60°
42°
4
72°
40°
5
82°
51°
6
70°
51°
7
64°
47°
8
63°
40°
9
59°
46°
10
71°
45°
11
63°
47°
12
67°
39°
13
70°
52°
14
63°
48°
15
66°
47°
16
81°
43°
17
86°
59°
18
94°
61°
19
94°
65°
20
90°
61°
21
62°
53°
22
69°
51°
23
56°
47°
24
56°
52°
25
75°
55°
26
79°
59°
27
79°
59°
28
76°
50°
29
75°
50°
30
69°
49°
31
68°
47°
1
74°
52°
2
72°
53°
3
75°
55°
4
74°
56°
5
78°
57°
6
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lehigh Valley
Lehigh Valley's May 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 47° and 59°. The average high for May is 73° with an average low of 53°. 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 Lehigh Valley. See also: June | July | August.
