S
M
T
W
T
F
S
26
66°
37°
27
68°
41°
28
65°
45°
29
65°
44°
30
71°
42°
1
73°
49°
2
69°
52°
3
61°
44°
4
61°
44°
5
61°
44°
6
59°
43°
7
61°
43°
8
64°
46°
9
65°
46°
10
64°
47°
11
61°
46°
12
58°
45°
13
57°
45°
14
57°
48°
15
60°
49°
16
62°
49°
17
62°
46°
18
63°
49°
19
66°
51°
20
66°
51°
21
67°
52°
22
66°
51°
23
67°
50°
24
66°
51°
25
66°
51°
26
64°
50°
27
60°
47°
28
59°
49°
29
61°
49°
30
64°
51°
31
66°
51°
1
66°
50°
2
67°
52°
3
68°
52°
4
67°
51°
5
67°
51°
6
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Horsham
Horsham's May 2026 forecast shows daily high temperatures ranging from 57° to 73°, with overnight lows between 42° and 52°. The average high for May is 64° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Horsham. See also: June | July | August.
