S
M
T
W
T
F
S
26
61°
46°
27
62°
49°
28
61°
51°
29
66°
50°
30
64°
49°
1
61°
47°
2
63°
46°
3
62°
47°
4
63°
49°
5
69°
54°
6
65°
52°
7
66°
48°
8
71°
50°
9
66°
53°
10
73°
56°
11
75°
56°
12
75°
55°
13
69°
57°
14
77°
54°
15
69°
50°
16
70°
52°
17
73°
58°
18
78°
59°
19
79°
52°
20
72°
49°
21
68°
50°
22
69°
54°
23
69°
51°
24
75°
57°
25
80°
61°
26
81°
61°
27
78°
60°
28
72°
61°
29
73°
61°
30
72°
60°
31
76°
63°
1
83°
61°
2
81°
61°
3
80°
63°
4
78°
62°
5
79°
61°
6
83°
58°
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 61° to 83°, with overnight lows between 46° and 63°. The average high for May is 72° with an average low of 55°. 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.
