S
M
T
W
T
F
S
26
83°
66°
27
87°
64°
28
84°
67°
29
77°
68°
30
81°
66°
31
86°
64°
1
84°
63°
2
81°
73°
3
84°
65°
4
86°
59°
5
84°
71°
6
89°
70°
7
89°
71°
8
87°
67°
9
91°
69°
10
86°
66°
11
84°
69°
12
84°
68°
13
85°
71°
14
82°
67°
15
86°
63°
16
80°
72°
17
87°
71°
18
83°
63°
19
85°
61°
20
82°
61°
21
80°
56°
22
78°
57°
23
80°
59°
24
76°
59°
25
N/A
26
84°
65°
27
86°
65°
28
83°
63°
29
83°
63°
30
85°
67°
31
89°
68°
1
81°
62°
2
80°
64°
3
79°
62°
4
79°
61°
5
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Greencastle
Greencastle's August 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 60° and 68°. The average high for August is 83° with an average low of 64°. 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 Greencastle. See also: September | October | November.
