S
M
T
W
T
F
S
26
82°
49°
27
87°
50°
28
84°
61°
29
68°
64°
30
79°
62°
31
82°
60°
1
88°
63°
2
86°
71°
3
78°
62°
4
86°
59°
5
87°
61°
6
91°
68°
7
91°
73°
8
89°
69°
9
88°
66°
10
86°
63°
11
85°
65°
12
85°
61°
13
84°
63°
14
83°
59°
15
81°
55°
16
82°
52°
17
76°
65°
18
86°
64°
19
85°
61°
20
84°
61°
21
78°
63°
22
71°
64°
23
75°
64°
24
80°
57°
25
79°
56°
26
82°
58°
27
83°
59°
28
85°
65°
29
78°
53°
30
80°
56°
31
79°
56°
1
69°
60°
2
74°
61°
3
76°
61°
4
81°
63°
5
73°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lancaster
Lancaster's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Lancaster. See also: September | October | November.