S
M
T
W
T
F
S
28
77°
61°
29
72°
52°
30
77°
59°
1
74°
57°
2
70°
50°
3
73°
53°
4
73°
54°
5
70°
56°
6
73°
60°
7
82°
58°
8
78°
62°
9
78°
61°
10
77°
61°
11
74°
59°
12
74°
58°
13
71°
57°
14
68°
58°
15
72°
59°
16
70°
58°
17
69°
58°
18
70°
59°
19
70°
59°
20
66°
58°
21
67°
58°
22
70°
57°
23
70°
59°
24
72°
60°
25
72°
60°
26
73°
59°
27
72°
60°
28
72°
59°
29
69°
56°
30
68°
59°
31
68°
60°
1
71°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Horncastle
Horncastle's July 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 50° and 62°. The average high for July is 72° with an average low of 58°. 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 Horncastle. See also: August | September | October.