S
M
T
W
T
F
S
26
55°
39°
27
70°
37°
28
66°
50°
29
59°
48°
30
50°
34°
1
54°
30°
2
46°
36°
3
57°
28°
4
72°
41°
5
73°
59°
6
57°
46°
7
59°
32°
8
61°
34°
9
64°
46°
10
63°
37°
11
63°
32°
12
68°
32°
13
69°
42°
14
50°
43°
15
64°
45°
16
76°
61°
17
76°
60°
18
88°
63°
19
83°
62°
20
71°
49°
21
66°
47°
22
68°
48°
23
70°
49°
24
67°
50°
25
73°
53°
26
72°
48°
27
71°
54°
28
72°
53°
29
71°
55°
30
73°
53°
31
69°
51°
1
68°
46°
2
68°
46°
3
69°
47°
4
70°
47°
5
75°
56°
6
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Bethlehem
South Bethlehem's May 2026 forecast shows daily high temperatures ranging from 50° to 88°, with overnight lows between 42° and 63°. The average high for May is 71° with an average low of 51°. 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 South Bethlehem. See also: June | July | August.
