S
M
T
W
T
F
S
28
83°
65°
29
89°
64°
30
92°
69°
1
95°
75°
2
94°
73°
3
95°
70°
4
89°
68°
5
84°
67°
6
85°
69°
7
86°
68°
8
85°
65°
9
85°
68°
10
82°
65°
11
86°
59°
12
87°
60°
13
89°
63°
14
92°
66°
15
93°
67°
16
91°
65°
17
89°
66°
18
88°
65°
19
87°
63°
20
89°
64°
21
90°
65°
22
83°
61°
23
81°
58°
24
89°
65°
25
89°
64°
26
88°
65°
27
90°
65°
28
88°
64°
29
84°
65°
30
81°
64°
31
82°
61°
1
80°
63°
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 80° to 93°, with overnight lows between 58° and 68°. The average high for July is 87° with an average low of 64°. 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.
