S
M
T
W
T
F
S
26
88°
71°
27
88°
71°
28
87°
70°
29
86°
70°
30
86°
65°
31
80°
63°
1
80°
64°
2
81°
64°
3
81°
65°
4
82°
64°
5
82°
63°
6
84°
66°
7
85°
69°
8
85°
68°
9
81°
69°
10
84°
62°
11
83°
62°
12
82°
63°
13
82°
67°
14
83°
68°
15
86°
66°
16
86°
69°
17
87°
69°
18
87°
67°
19
85°
61°
20
81°
61°
21
79°
62°
22
79°
60°
23
80°
60°
24
79°
61°
25
80°
61°
26
83°
60°
27
82°
61°
28
80°
63°
29
81°
61°
30
78°
61°
31
80°
64°
1
84°
57°
2
82°
58°
3
77°
57°
4
78°
58°
5
78°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Horsham
Horsham's August 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 57° and 71°. The average high for August is 82° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Horsham. See also: September | October | November.
