S
M
T
W
T
F
S
28
77°
61°
29
72°
52°
30
77°
59°
1
75°
59°
2
72°
57°
3
77°
50°
4
73°
61°
5
75°
64°
6
84°
63°
7
79°
63°
8
84°
64°
9
90°
63°
10
86°
63°
11
73°
61°
12
75°
59°
13
70°
59°
14
70°
59°
15
71°
55°
16
73°
54°
17
71°
53°
18
69°
49°
19
67°
50°
20
69°
53°
21
73°
55°
22
72°
56°
23
73°
57°
24
74°
58°
25
75°
60°
26
73°
59°
27
74°
60°
28
67°
57°
29
68°
60°
30
69°
59°
31
68°
59°
1
68°
58°
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 67° to 75°, with overnight lows between 49° and 60°. The average high for July is 71° with an average low of 56°. 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.