S
M
T
W
T
F
S
31
75°
41°
1
75°
43°
2
76°
50°
3
80°
44°
4
84°
46°
5
84°
52°
6
82°
61°
7
84°
55°
8
87°
63°
9
86°
68°
10
83°
68°
11
88°
68°
12
88°
66°
13
88°
67°
14
83°
60°
15
77°
55°
16
80°
61°
17
81°
60°
18
80°
61°
19
79°
57°
20
80°
59°
21
82°
61°
22
82°
62°
23
79°
62°
24
79°
61°
25
85°
63°
26
85°
63°
27
86°
62°
28
81°
61°
29
80°
59°
30
82°
63°
1
86°
63°
2
82°
62°
3
80°
63°
4
82°
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 77° to 88°, with overnight lows between 55° and 68°. The average high for June is 83° 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.
