S
M
T
W
T
F
S
31
77°
48°
1
71°
55°
2
75°
51°
3
80°
55°
4
82°
61°
5
83°
63°
6
81°
64°
7
81°
60°
8
82°
62°
9
79°
63°
10
78°
60°
11
82°
62°
12
81°
61°
13
80°
59°
14
80°
60°
15
77°
59°
16
73°
55°
17
74°
55°
18
75°
57°
19
76°
58°
20
76°
63°
21
77°
63°
22
78°
64°
23
77°
63°
24
78°
62°
25
78°
64°
26
82°
65°
27
81°
64°
28
79°
61°
29
78°
58°
30
77°
57°
1
78°
58°
2
78°
59°
3
80°
65°
4
79°
58°
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 73° to 83°, with overnight lows between 51° and 65°. The average high for June is 79° with an average low of 60°. 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.
