Isle of Man weather
Our guide to the weather in Isle of Man during September
We've looked at the most up-to-date weather data for Isle of Man, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Isle of Man weather in September.
What's the temperature like in Isle of Man during September?
September is typically the warmest month in Isle of Man. The temperature reaches around 15℃ during the daytime, falling away to 12℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in Isle of Man during September?
On average, there will be 6 rainy days during the month, amounting to 98.1mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. You're not likely to see a thunderstorm during your trip.
Is it windy in Isle of Man during September?
Expect moderate breeze becoming stronger at times during September, with occasional gusts up to 23mph. With moderate air temperatures, any breeze will feel cool.
Weather in Isle of Man
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