S
M
T
W
T
F
S
26
59°
42°
27
65°
40°
28
69°
53°
29
55°
44°
30
56°
42°
1
49°
37°
2
48°
36°
3
64°
34°
4
75°
48°
5
64°
47°
6
55°
46°
7
58°
42°
8
63°
40°
9
70°
48°
10
63°
40°
11
57°
37°
12
61°
33°
13
60°
45°
14
65°
42°
15
69°
38°
16
79°
54°
17
85°
59°
18
89°
65°
19
86°
65°
20
71°
46°
21
63°
41°
22
65°
52°
23
61°
54°
24
71°
55°
25
76°
56°
26
79°
60°
27
78°
57°
28
76°
53°
29
75°
59°
30
76°
56°
31
76°
57°
1
81°
62°
2
79°
58°
3
78°
57°
4
77°
67°
5
75°
60°
6
72°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oldcastle
Oldcastle's May 2026 forecast shows daily high temperatures ranging from 61° to 81°, with overnight lows between 52° and 67°. The average high for May is 75° with an average low of 57°. 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 Oldcastle. See also: June | July | August.
