S
M
T
W
T
F
S
28
81°
65°
29
85°
64°
30
87°
66°
1
93°
70°
2
102°
76°
3
97°
76°
4
94°
70°
5
86°
67°
6
78°
63°
7
78°
63°
8
82°
62°
9
84°
63°
10
83°
64°
11
87°
65°
12
85°
64°
13
85°
62°
14
82°
64°
15
84°
62°
16
78°
58°
17
82°
61°
18
80°
61°
19
84°
63°
20
84°
64°
21
78°
64°
22
79°
64°
23
79°
63°
24
80°
64°
25
80°
64°
26
81°
63°
27
83°
65°
28
83°
64°
29
82°
65°
30
84°
66°
31
85°
65°
1
84°
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 102°, with overnight lows between 58° and 76°. The average high for July is 84° 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.
