S
M
T
W
T
F
S
28
86°
49°
29
85°
51°
30
86°
49°
1
85°
47°
2
84°
51°
3
84°
44°
4
85°
47°
5
84°
47°
6
85°
48°
7
88°
48°
8
89°
49°
9
92°
54°
10
92°
54°
11
89°
53°
12
89°
51°
13
90°
54°
14
90°
52°
15
91°
56°
16
93°
54°
17
93°
53°
18
90°
51°
19
86°
50°
20
86°
48°
21
87°
53°
22
86°
52°
23
86°
53°
24
88°
52°
25
89°
61°
26
91°
55°
27
90°
53°
28
93°
54°
29
87°
54°
30
84°
52°
31
87°
51°
1
87°
53°
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 84° to 93°, with overnight lows between 44° and 61°. The average high for July is 88° with an average low of 52°. 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.
