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
59°
50°
25
79°
55°
26
82°
51°
27
83°
63°
28
75°
55°
29
77°
49°
30
68°
50°
31
76°
41°
1
76°
52°
2
76°
54°
3
82°
54°
4
88°
58°
5
90°
63°
6
90°
64°
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 76° to 90°, with overnight lows between 54° and 64°. The average high for May is 85° 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 Lehigh Valley. See also: June | July | August.
