S
M
T
W
T
F
S
28
86°
67°
29
92°
64°
30
95°
69°
1
95°
67°
2
96°
67°
3
98°
68°
4
93°
72°
5
92°
67°
6
91°
66°
7
86°
67°
8
87°
69°
9
85°
69°
10
83°
67°
11
82°
65°
12
86°
66°
13
89°
66°
14
92°
65°
15
96°
70°
16
95°
73°
17
92°
72°
18
85°
71°
19
84°
68°
20
87°
67°
21
85°
65°
22
78°
63°
23
80°
63°
24
84°
65°
25
84°
65°
26
82°
66°
27
83°
63°
28
86°
65°
29
81°
61°
30
79°
66°
31
81°
64°
1
84°
66°
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 96°, with overnight lows between 61° and 73°. The average high for July is 85° 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.
