S
M
T
W
T
F
S
31
79°
40°
1
87°
42°
2
89°
45°
3
88°
49°
4
92°
50°
5
93°
51°
6
94°
56°
7
91°
52°
8
89°
56°
9
92°
55°
10
87°
42°
11
78°
45°
12
86°
49°
13
87°
51°
14
82°
50°
15
82°
53°
16
84°
52°
17
83°
53°
18
84°
55°
19
85°
45°
20
87°
51°
21
82°
50°
22
85°
52°
23
88°
51°
24
89°
53°
25
89°
53°
26
85°
51°
27
86°
50°
28
89°
53°
29
85°
52°
30
89°
54°
1
89°
54°
2
90°
53°
3
90°
55°
4
90°
54°
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 78° to 94°, with overnight lows between 42° and 56°. The average high for June is 87° with an average low of 52°. 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.
