Channel Islands weather
Our guide to the weather in Channel Islands during September
We've looked at the most up-to-date weather data for Channel Islands, 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 Channel Islands weather in September.
What's the temperature like in Channel Islands during September?
The temperature reaches around 15℃ during the daytime in September, falling away to 7℃ 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 Channel Islands during September?
On average, there will be 6 rainy days during the month, amounting to 65.1mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in Channel Islands during September?
You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during September. With moderate air temperatures, any breeze will feel cool.
Weather in Channel Islands
Our month-by-month guide to the weather and climate in Channel Islands
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