Click on a day for an hourly weather forecast
The temperatures in High Wycombe in September are usually low and can range between 11°C and 19°C.
You can expect about 3 to 8 days of rain in High Wycombe 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 High Wycombe in September 2025.
If you’re planning to visit High Wycombe in the near future, we highly recommend that you review the 14 day weather forecast for High Wycombe before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 2° | 7 | 22 | 3 | 51 mm | Awful | High Wycombe in January |
| February | 8° / 3° | 8 | 17 | 4 | 49 mm | Bad | High Wycombe in February |
| March | 11° / 4° | 5 | 25 | 1 | 40 mm | Ok | High Wycombe in March |
| April | 14° / 5° | 4 | 26 | 0 | 39 mm | Good | High Wycombe in April |
| May | 17° / 8° | 4 | 27 | 0 | 54 mm | Good | High Wycombe in May |
| June | 20° / 11° | 4 | 26 | 0 | 74 mm | Good | High Wycombe in June |
| July | 22° / 13° | 4 | 27 | 0 | 66 mm | Good | High Wycombe in July |
| August | 21° / 13° | 5 | 26 | 0 | 63 mm | Good | High Wycombe in August |
| September | 19° / 11° | 3 | 27 | 0 | 39 mm | Good | High Wycombe in September |
| October | 15° / 9° | 6 | 25 | 0 | 56 mm | Good | High Wycombe in October |
| November | 10° / 6° | 6 | 24 | 0 | 54 mm | Ok | High Wycombe in November |
| December | 8° / 4° | 6 | 23 | 2 | 56 mm | Bad | High Wycombe in December |