Click on a day for an hourly weather forecast
The temperatures in Windermere in September are comfortable with low of 19°C and and high up to 26°C.
You can expect a few rainy days in Windermere during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Windermere in September 2025.
If you’re planning to visit Windermere in the near future, we highly recommend that you review the 14 day weather forecast for Windermere before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 25° | 8 | 23 | 0 | 312 mm | Ok | Windermere in January |
| February | 30° / 25° | 8 | 20 | 0 | 266 mm | Ok | Windermere in February |
| March | 29° / 24° | 8 | 23 | 0 | 273 mm | Ok | Windermere in March |
| April | 27° / 22° | 3 | 27 | 0 | 86 mm | Perfect | Windermere in April |
| May | 25° / 20° | 1 | 30 | 0 | 49 mm | Perfect | Windermere in May |
| June | 23° / 18° | 1 | 29 | 0 | 34 mm | Perfect | Windermere in June |
| July | 23° / 17° | 1 | 30 | 0 | 31 mm | Perfect | Windermere in July |
| August | 24° / 17° | 1 | 30 | 0 | 28 mm | Perfect | Windermere in August |
| September | 26° / 19° | 1 | 29 | 0 | 16 mm | Perfect | Windermere in September |
| October | 27° / 21° | 1 | 30 | 0 | 36 mm | Perfect | Windermere in October |
| November | 28° / 23° | 3 | 27 | 0 | 55 mm | Perfect | Windermere in November |
| December | 30° / 24° | 4 | 27 | 0 | 148 mm | Good | Windermere in December |