St Helier weather

Our guide to the weather in St Helier during August

18

Average high

4

UV Index

92mm

Monthly rainfall

81%

Humidity

We've looked at the most up-to-date weather data for St Helier, 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 St Helier weather in August.

What's the temperature like in St Helier during August?

August is typically the warmest month in St Helier. The temperature reaches around 18℃ during the daytime, falling away to 16℃ 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 St Helier during August?

On average, there will be 5 rainy days during the month, amounting to 91.5mm 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 St Helier during August?

Expect moderate breeze becoming stronger at times during August, with occasional gusts up to 20mph. With moderate air temperatures, any breeze will feel cool.

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St Helier Blog posts

From the UK's most popular travel bloggers

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The Club Hotel & Spa St Helier Review, Jersey

25th June 2023 by I'm just a girl 16

Are you planning a trip to Jersey in the Channel Islands and looking for the perfect place to stay? Look no further than The Club Hotel & Spa St Helier! This review post will provide you with an ultimate insight into my stay at this luxurious hotel. Please see my disclaimer for more information regarding mentions of a press trip with Jet2holidays and Visit Jersey, plus affiliate links....

Weather in St Helier

Our month-by-month guide to the weather and climate in St Helier

9.3

St Helier weather in

January
8.9

St Helier weather in

February
9.8

St Helier weather in

March
11.1

St Helier weather in

April
13.0

St Helier weather in

May
15.6

St Helier weather in

June
17.6

St Helier weather in

July
18.2

St Helier weather in

August
17.5

St Helier weather in

September
15.7

St Helier weather in

October
12.8

St Helier weather in

November
10.8

St Helier weather in

December