Click on a day for an hourly weather forecast
The temperatures in Kings Lynn in September are comfortable with low of 15°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Kings Lynn 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 Kings Lynn in September 2025.
If you’re planning to visit Kings Lynn in the near future, we highly recommend that you review the 14 day weather forecast for Kings Lynn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 25° / 20° | 4 | 27 | 0 | 75 mm | Perfect | Kings Lynn in January |
| February | 26° / 20° | 5 | 23 | 0 | 95 mm | Perfect | Kings Lynn in February |
| March | 25° / 20° | 5 | 26 | 0 | 75 mm | Perfect | Kings Lynn in March |
| April | 23° / 18° | 4 | 26 | 0 | 83 mm | Perfect | Kings Lynn in April |
| May | 23° / 17° | 1 | 30 | 0 | 34 mm | Perfect | Kings Lynn in May |
| June | 21° / 15° | 2 | 28 | 0 | 39 mm | Good | Kings Lynn in June |
| July | 21° / 14° | 2 | 29 | 0 | 48 mm | Good | Kings Lynn in July |
| August | 21° / 14° | 2 | 29 | 0 | 42 mm | Good | Kings Lynn in August |
| September | 21° / 15° | 3 | 27 | 0 | 46 mm | Good | Kings Lynn in September |
| October | 22° / 16° | 5 | 26 | 0 | 96 mm | Good | Kings Lynn in October |
| November | 22° / 16° | 5 | 25 | 0 | 84 mm | Good | Kings Lynn in November |
| December | 24° / 18° | 5 | 26 | 0 | 63 mm | Perfect | Kings Lynn in December |