S
M
T
W
T
F
S
26
75°
48°
27
64°
57°
28
63°
53°
29
63°
41°
30
63°
37°
1
56°
42°
2
56°
39°
3
64°
39°
4
76°
50°
5
56°
47°
6
60°
39°
7
63°
37°
8
66°
45°
9
76°
51°
10
69°
48°
11
70°
44°
12
82°
43°
13
68°
42°
14
69°
38°
15
72°
50°
16
75°
64°
17
86°
64°
18
81°
64°
19
82°
61°
20
70°
51°
21
69°
48°
22
72°
54°
23
80°
58°
24
75°
57°
25
82°
51°
26
79°
58°
27
83°
64°
28
87°
59°
29
84°
56°
30
81°
52°
31
79°
59°
1
82°
56°
2
84°
52°
3
81°
55°
4
83°
59°
5
86°
65°
6
83°
64°
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 79° to 86°, with overnight lows between 52° and 65°. The average high for May is 82° with an average low of 58°. 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.
