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
80°
66°
7
82°
60°
8
89°
53°
9
84°
66°
10
88°
68°
11
87°
67°
12
81°
58°
13
83°
55°
14
80°
58°
15
67°
48°
16
76°
56°
17
78°
66°
18
83°
56°
19
76°
53°
20
76°
55°
21
77°
58°
22
77°
58°
23
83°
60°
24
79°
59°
25
78°
58°
26
81°
60°
27
83°
62°
28
82°
59°
29
78°
55°
30
78°
55°
1
79°
56°
2
80°
63°
3
81°
60°
4
81°
57°
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 76° to 83°, with overnight lows between 53° and 66°. The average high for June is 79° with an average low of 58°. 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.
