S
M
T
W
T
F
S
28
80°
64°
29
80°
66°
30
82°
65°
1
83°
70°
2
86°
70°
3
87°
69°
4
84°
68°
5
89°
65°
6
84°
64°
7
84°
65°
8
85°
71°
9
85°
69°
10
88°
69°
11
90°
66°
12
84°
65°
13
83°
64°
14
84°
65°
15
84°
67°
16
87°
66°
17
87°
66°
18
90°
66°
19
87°
69°
20
86°
72°
21
84°
73°
22
Hist. Avg.
87°
69°
23
Hist. Avg.
87°
69°
24
Hist. Avg.
87°
69°
25
Hist. Avg.
87°
69°
26
Hist. Avg.
87°
69°
27
Hist. Avg.
87°
68°
28
Hist. Avg.
86°
68°
29
Hist. Avg.
86°
68°
30
Hist. Avg.
86°
68°
31
Hist. Avg.
86°
68°
1
Hist. Avg.
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in New Castle
New Castle's July 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 64° and 73°. The average high for July is 85° 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.
