The climate in Horsham during May can be summarized as mild and reasonably dry.
May is in the fall / autumn in Horsham and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 6°C (43°F) is normal.
| Daytime temperature | 17°C 62.5°F |
|---|---|
| Nightly temperature | 5.9°C 42.5°F |
| Average temperature | 11.4°C 52.5°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 52 mm 2 ins |
| Rainy days | 9 days |
| Sea temperature | 17.1°C 62.9°F |
| Humidity | 72% |
| Windspeed | 12.6kph 8 mph |
On average May is the 3rd wettest month of the year in Horsham with around 52mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Horsham in May 2025.
| Hottest month: | February | 28.9°C 84°F |
|---|---|---|
| Driest month: | December | 25mm 1ins |
| Sunniest month: | February | 9.4hrs |
| Coldest month: | July | 13°C 55.4°F |
| Wettest month: | August | 55mm 2.2ins |