S
M
T
W
T
F
S
31
74°
42°
1
66°
47°
2
76°
52°
3
82°
53°
4
86°
56°
5
90°
65°
6
91°
69°
7
79°
54°
8
66°
52°
9
73°
53°
10
78°
57°
11
83°
61°
12
79°
61°
13
80°
59°
14
81°
60°
15
83°
56°
16
72°
53°
17
72°
52°
18
74°
53°
19
76°
55°
20
78°
55°
21
77°
54°
22
74°
54°
23
74°
59°
24
75°
61°
25
77°
55°
26
75°
55°
27
78°
61°
28
82°
62°
29
79°
58°
30
77°
57°
1
76°
57°
2
77°
58°
3
79°
63°
4
83°
63°
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 66° to 91°, with overnight lows between 52° and 69°. The average high for June is 78° with an average low of 57°. 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.
