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
78°
57°
26
84°
56°
27
N/A
28
83°
60°
29
79°
63°
30
88°
67°
31
88°
68°
1
92°
71°
2
92°
70°
3
88°
67°
4
83°
63°
5
81°
62°
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 92°, with overnight lows between 60° and 71°. The average high for August is 86° with an average low of 66°. 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.
