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
93°
64°
19
94°
69°
20
88°
51°
21
67°
44°
22
61°
48°
23
65°
52°
24
75°
54°
25
74°
53°
26
75°
54°
27
75°
54°
28
77°
53°
29
78°
54°
30
76°
54°
31
80°
52°
1
75°
55°
2
73°
56°
3
70°
56°
4
72°
55°
5
74°
54°
6
74°
56°
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 61° to 94°, with overnight lows between 44° and 69°. The average high for May is 76° with an average low of 54°. 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.
