S
M
T
W
T
F
S
28
83°
65°
29
89°
64°
30
92°
69°
1
95°
75°
2
95°
74°
3
99°
72°
4
89°
70°
5
84°
68°
6
84°
65°
7
86°
69°
8
89°
65°
9
88°
64°
10
87°
63°
11
86°
65°
12
86°
64°
13
85°
67°
14
86°
65°
15
87°
61°
16
81°
57°
17
81°
58°
18
82°
59°
19
86°
64°
20
87°
64°
21
82°
63°
22
85°
64°
23
87°
64°
24
84°
63°
25
85°
62°
26
87°
64°
27
88°
64°
28
89°
65°
29
88°
66°
30
89°
65°
31
86°
64°
1
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in New Castle Northwest
New Castle Northwest's July 2026 forecast shows daily high temperatures ranging from 81° to 99°, with overnight lows between 57° and 74°. The average high for July is 86° with an average low of 65°. 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 Northwest. See also: August | September | October.
