Jersey weather

Our guide to the weather in Jersey during September

18

Average high

4

UV Index

81mm

Monthly rainfall

78%

Humidity

Jersey is a beautiful island with plenty of attractions, activities and stunning scenery to explore - come prepared for mild but changeable weather in September. We've looked at the most up-to-date weather data for Jersey, 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 Jersey weather in September.

What's the temperature like in Jersey during September?

The temperature is extremely stable in September with average highs of 18℃ and lows just 2℃ lower at 15℃. 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 Jersey during September?

On average, there will be 5 rainy days during the month, amounting to 81.4mm 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. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Jersey during September?

Expect moderate breeze becoming stronger at times during September, with occasional gusts up to 21mph. With moderate air temperatures, any breeze will feel cool.

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Weather in Jersey

Our month-by-month guide to the weather and climate in Jersey

9.3

Jersey weather in

January
8.9

Jersey weather in

February
9.8

Jersey weather in

March
11.1

Jersey weather in

April
13.0

Jersey weather in

May
15.6

Jersey weather in

June
17.6

Jersey weather in

July
18.2

Jersey weather in

August
17.5

Jersey weather in

September
15.7

Jersey weather in

October
12.8

Jersey weather in

November
10.8

Jersey weather in

December