S
M
T
W
T
F
S
26
71°
55°
27
67°
55°
28
67°
55°
29
68°
56°
30
68°
55°
31
69°
56°
1
69°
55°
2
67°
56°
3
67°
55°
4
68°
55°
5
69°
56°
6
70°
55°
7
69°
54°
8
68°
54°
9
67°
54°
10
67°
55°
11
69°
56°
12
71°
56°
13
70°
55°
14
71°
55°
15
71°
54°
16
70°
55°
17
68°
54°
18
69°
54°
19
68°
54°
20
69°
54°
21
69°
54°
22
66°
54°
23
67°
53°
24
66°
52°
25
66°
50°
26
67°
50°
27
66°
51°
28
66°
50°
29
67°
52°
30
66°
49°
31
66°
49°
1
65°
50°
2
65°
52°
3
66°
48°
4
68°
48°
5
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Greencastle
Greencastle's August 2026 forecast shows daily high temperatures ranging from 65° to 71°, with overnight lows between 48° and 56°. The average high for August is 68° with an average low of 53°. 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.
