S
M
T
W
T
F
S
26
63°
43°
27
72°
37°
28
60°
52°
29
57°
51°
30
60°
41°
1
60°
35°
2
56°
39°
3
62°
38°
4
77°
34°
5
81°
52°
6
66°
48°
7
66°
41°
8
62°
48°
9
64°
45°
10
65°
47°
11
60°
38°
12
61°
40°
13
58°
48°
14
63°
48°
15
68°
49°
16
71°
51°
17
75°
51°
18
76°
54°
19
81°
55°
20
81°
57°
21
79°
51°
22
68°
47°
23
69°
50°
24
69°
48°
25
70°
50°
26
72°
53°
27
71°
50°
28
73°
49°
29
71°
49°
30
75°
53°
31
79°
59°
1
76°
57°
2
77°
52°
3
79°
59°
4
81°
60°
5
81°
61°
6
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Williamsport
Williamsport's May 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 38° and 61°. The average high for May is 72° 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 Williamsport. See also: June | July | August.
