S
M
T
W
T
F
S
31
74°
42°
1
66°
47°
2
75°
46°
3
81°
55°
4
87°
54°
5
90°
65°
6
91°
69°
7
79°
54°
8
74°
52°
9
78°
53°
10
81°
57°
11
86°
63°
12
85°
61°
13
81°
59°
14
81°
60°
15
83°
60°
16
82°
56°
17
73°
53°
18
74°
59°
19
80°
59°
20
79°
56°
21
80°
54°
22
75°
54°
23
75°
55°
24
76°
58°
25
79°
62°
26
83°
62°
27
83°
56°
28
77°
56°
29
79°
57°
30
76°
56°
1
78°
58°
2
77°
57°
3
83°
61°
4
84°
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 73° to 91°, with overnight lows between 52° and 69°. The average high for June is 80° 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.
