S
M
T
W
T
F
S
31
78°
53°
1
78°
58°
2
77°
54°
3
82°
52°
4
84°
60°
5
83°
65°
6
88°
67°
7
84°
69°
8
84°
69°
9
84°
65°
10
82°
66°
11
84°
65°
12
85°
66°
13
86°
64°
14
87°
63°
15
86°
63°
16
84°
64°
17
82°
60°
18
81°
64°
19
82°
66°
20
88°
65°
21
87°
63°
22
81°
58°
23
81°
60°
24
87°
66°
25
88°
66°
26
88°
65°
27
84°
64°
28
86°
66°
29
82°
66°
30
82°
65°
1
83°
66°
2
82°
62°
3
82°
60°
4
83°
61°
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 81° to 88°, with overnight lows between 58° and 69°. The average high for June is 84° with an average low of 64°. 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.
