S
M
T
W
T
F
S
26
83°
66°
27
82°
66°
28
86°
67°
29
87°
67°
30
84°
66°
31
83°
67°
1
85°
66°
2
84°
67°
3
85°
68°
4
88°
67°
5
84°
64°
6
83°
67°
7
85°
67°
8
86°
60°
9
79°
59°
10
79°
60°
11
80°
63°
12
80°
65°
13
81°
66°
14
82°
67°
15
85°
66°
16
83°
63°
17
81°
59°
18
81°
57°
19
82°
65°
20
86°
64°
21
84°
65°
22
86°
62°
23
85°
64°
24
82°
60°
25
79°
58°
26
79°
57°
27
77°
57°
28
77°
58°
29
79°
57°
30
81°
60°
31
84°
63°
1
84°
63°
2
85°
62°
3
84°
55°
4
78°
53°
5
76°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Williamsport
Williamsport's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 53° and 68°. The average high for August is 82° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Williamsport. See also: September | October | November.
