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
84°
70°
10
79°
70°
11
80°
68°
12
85°
67°
13
85°
64°
14
89°
65°
15
93°
67°
16
91°
70°
17
92°
69°
18
90°
68°
19
87°
67°
20
86°
65°
21
88°
66°
22
85°
64°
23
81°
61°
24
89°
69°
25
89°
68°
26
88°
68°
27
88°
67°
28
87°
67°
29
84°
66°
30
80°
66°
31
81°
65°
1
80°
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 79° to 93°, with overnight lows between 61° and 70°. The average high for July is 86° with an average low of 67°. 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.
