Click on a day for an hourly weather forecast
The weather in Douglas in September is hot. The average temperatures are between 18°C and 31°C. Usually the days in September are hot while the nights are a bit cooler.
You can expect about 3 to 8 days of rain in Douglas 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 Douglas in September 2025.
If you’re planning to visit Douglas in the near future, we highly recommend that you review the 14 day weather forecast for Douglas before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 16° / 3° | 2 | 29 | 0 | 24 mm | Good | Douglas in January |
| February | 18° / 4° | 2 | 26 | 0 | 20 mm | Good | Douglas in February |
| March | 22° / 7° | 1 | 30 | 0 | 14 mm | Good | Douglas in March |
| April | 26° / 9° | 0 | 30 | 0 | 5 mm | Perfect | Douglas in April |
| May | 30° / 12° | 0 | 31 | 0 | 3 mm | Good | Douglas in May |
| June | 35° / 19° | 1 | 29 | 0 | 21 mm | Ok | Douglas in June |
| July | 33° / 22° | 6 | 25 | 0 | 140 mm | Good | Douglas in July |
| August | 33° / 22° | 4 | 27 | 0 | 109 mm | Good | Douglas in August |
| September | 31° / 18° | 3 | 27 | 0 | 63 mm | Good | Douglas in September |
| October | 26° / 13° | 1 | 30 | 0 | 20 mm | Perfect | Douglas in October |
| November | 21° / 7° | 1 | 29 | 0 | 27 mm | Good | Douglas in November |
| December | 16° / 4° | 2 | 29 | 0 | 25 mm | Good | Douglas in December |