S
M
T
W
T
F
S
28
82°
69°
29
87°
69°
30
91°
73°
1
100°
72°
2
100°
69°
3
101°
74°
4
96°
70°
5
97°
72°
6
92°
71°
7
93°
70°
8
89°
64°
9
86°
65°
10
90°
66°
11
85°
65°
12
84°
64°
13
85°
63°
14
86°
64°
15
87°
65°
16
88°
61°
17
82°
60°
18
85°
61°
19
87°
65°
20
88°
65°
21
82°
64°
22
83°
65°
23
87°
65°
24
88°
66°
25
88°
66°
26
87°
65°
27
88°
66°
28
87°
65°
29
88°
66°
30
89°
67°
31
87°
66°
1
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in New Castle
New Castle's July 2026 forecast shows daily high temperatures ranging from 82° to 101°, with overnight lows between 60° and 74°. The average high for July is 88° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in New Castle. See also: August | September | October.
