Isle of Man in September: where is it warmest?
In September, Douglas averages 15 °C by day.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Douglas | 52 | 15° | 15° | 5 h | 14 |
Isle of Man in September: quick answers
Isle of Man in September: where is it warmest?
The warmest places in September are Douglas (15 °C).
Isle of Man in September: where is the sea warmest?
The sea is warmest at Douglas (15 °C).
Isle of Man in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Douglas.
Isle of Man month by month
Isle of Man: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences