S
M
T
W
T
F
S
26
77°
52°
27
76°
51°
28
62°
47°
29
59°
38°
30
62°
35°
1
63°
32°
2
62°
35°
3
72°
43°
4
80°
50°
5
55°
47°
6
59°
38°
7
68°
40°
8
63°
46°
9
80°
52°
10
68°
45°
11
77°
44°
12
81°
52°
13
73°
46°
14
77°
43°
15
85°
58°
16
78°
63°
17
85°
63°
18
77°
62°
19
65°
50°
20
65°
44°
21
68°
52°
22
71°
58°
23
77°
51°
24
80°
48°
25
82°
51°
26
82°
53°
27
86°
61°
28
86°
63°
29
76°
64°
30
78°
62°
31
83°
61°
1
82°
55°
2
83°
56°
3
82°
57°
4
81°
58°
5
84°
60°
6
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Greencastle
Greencastle's May 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 55° and 64°. The average high for May is 82° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Greencastle. See also: June | July | August.
