S
M
T
W
T
F
S
31
75°
53°
1
79°
60°
2
73°
54°
3
81°
48°
4
86°
61°
5
89°
63°
6
89°
67°
7
89°
65°
8
86°
60°
9
84°
57°
10
85°
59°
11
87°
64°
12
86°
66°
13
89°
66°
14
88°
65°
15
87°
63°
16
86°
64°
17
85°
58°
18
84°
61°
19
85°
63°
20
85°
63°
21
86°
61°
22
82°
56°
23
81°
59°
24
85°
63°
25
86°
64°
26
87°
64°
27
84°
63°
28
83°
64°
29
80°
63°
30
80°
63°
1
81°
59°
2
80°
58°
3
81°
58°
4
82°
59°
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 80° to 89°, with overnight lows between 56° and 67°. The average high for June is 85° with an average low of 62°. 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.
