S
M
T
W
T
F
S
31
91°
70°
1
85°
69°
2
87°
65°
3
87°
60°
4
84°
62°
5
85°
63°
6
86°
65°
7
83°
67°
8
85°
66°
9
88°
69°
10
88°
66°
11
87°
65°
12
86°
65°
13
85°
66°
14
87°
64°
15
86°
68°
16
87°
67°
17
84°
68°
18
83°
68°
19
85°
67°
20
87°
68°
21
89°
69°
22
89°
68°
23
88°
68°
24
85°
66°
25
86°
65°
26
88°
69°
27
88°
68°
28
85°
69°
29
85°
69°
30
86°
67°
1
86°
64°
2
87°
70°
3
86°
70°
4
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in New Castle
New Castle's June 2026 forecast shows daily high temperatures ranging from 83° to 89°, with overnight lows between 60° and 70°. The average high for June is 86° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in New Castle. See also: July | August | September.
