S
M
T
W
T
F
S
31
78°
49°
1
77°
54°
2
79°
57°
3
84°
56°
4
87°
62°
5
92°
67°
6
93°
69°
7
86°
63°
8
75°
57°
9
77°
60°
10
78°
64°
11
81°
65°
12
85°
65°
13
84°
67°
14
84°
66°
15
85°
70°
16
75°
59°
17
76°
60°
18
78°
61°
19
79°
62°
20
81°
64°
21
81°
66°
22
79°
66°
23
79°
68°
24
80°
68°
25
81°
64°
26
80°
65°
27
85°
70°
28
86°
69°
29
82°
66°
30
81°
64°
1
81°
64°
2
82°
67°
3
83°
70°
4
88°
70°
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 75° to 93°, with overnight lows between 56° and 70°. The average high for June is 82° with an average low of 65°. 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.
