Click on a day for an hourly weather forecast
The temperatures in Horndean in September are usually low and can range between 13°C and 18°C.
You can expect about 3 to 8 days of rain in Horndean during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Horndean in September 2025.
If you’re planning to visit Horndean in the near future, we highly recommend that you review the 14 day weather forecast for Horndean before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 4° | 9 | 19 | 2 | 108 mm | Awful | Horndean in January |
| February | 8° / 5° | 8 | 18 | 2 | 88 mm | Awful | Horndean in February |
| March | 10° / 5° | 6 | 25 | 1 | 69 mm | Ok | Horndean in March |
| April | 12° / 7° | 5 | 25 | 0 | 57 mm | Ok | Horndean in April |
| May | 15° / 9° | 5 | 26 | 0 | 69 mm | Good | Horndean in May |
| June | 17° / 12° | 5 | 25 | 0 | 89 mm | Good | Horndean in June |
| July | 20° / 14° | 5 | 26 | 0 | 79 mm | Good | Horndean in July |
| August | 20° / 15° | 5 | 26 | 0 | 82 mm | Good | Horndean in August |
| September | 18° / 13° | 5 | 25 | 0 | 68 mm | Good | Horndean in September |
| October | 15° / 11° | 8 | 23 | 0 | 126 mm | Ok | Horndean in October |
| November | 11° / 8° | 8 | 21 | 0 | 127 mm | Bad | Horndean in November |
| December | 9° / 6° | 9 | 21 | 1 | 122 mm | Bad | Horndean in December |