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
102°
73°
5
92°
71°
6
87°
69°
7
78°
69°
8
85°
65°
9
82°
70°
10
88°
71°
11
92°
69°
12
87°
65°
13
85°
64°
14
92°
68°
15
98°
73°
16
93°
69°
17
94°
67°
18
85°
69°
19
91°
72°
20
88°
69°
21
86°
68°
22
85°
69°
23
84°
68°
24
83°
69°
25
84°
72°
26
86°
71°
27
83°
68°
28
85°
71°
29
87°
68°
30
82°
69°
31
83°
70°
1
82°
68°
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 82° to 98°, with overnight lows between 64° and 73°. The average high for July is 87° with an average low of 69°. 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.
