S
M
T
W
T
F
S
28
84°
70°
29
90°
70°
30
90°
71°
1
91°
71°
2
92°
70°
3
92°
71°
4
88°
68°
5
83°
69°
6
85°
69°
7
83°
66°
8
85°
64°
9
86°
67°
10
85°
70°
11
77°
69°
12
85°
61°
13
87°
65°
14
89°
68°
15
91°
68°
16
90°
70°
17
88°
66°
18
86°
66°
19
85°
64°
20
81°
59°
21
81°
58°
22
82°
59°
23
81°
59°
24
79°
58°
25
82°
61°
26
87°
65°
27
85°
65°
28
84°
62°
29
78°
58°
30
78°
62°
31
79°
59°
1
82°
64°
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 78° to 91°, with overnight lows between 58° and 70°. The average high for July is 84° with an average low of 63°. 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.
