S
M
T
W
T
F
S
28
82°
68°
29
90°
69°
30
90°
69°
1
96°
72°
2
103°
78°
3
102°
79°
4
99°
75°
5
95°
72°
6
80°
70°
7
79°
69°
8
83°
68°
9
85°
71°
10
91°
73°
11
89°
69°
12
85°
68°
13
83°
69°
14
83°
68°
15
87°
71°
16
89°
78°
17
85°
68°
18
85°
70°
19
89°
72°
20
88°
72°
21
83°
71°
22
84°
71°
23
86°
72°
24
85°
71°
25
86°
71°
26
88°
72°
27
88°
72°
28
87°
71°
29
88°
72°
30
89°
73°
31
89°
72°
1
88°
71°
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 79° to 99°, with overnight lows between 68° and 78°. The average high for July is 87° with an average low of 71°. 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.
