Cornwall weather
Our guide to the weather in Cornwall during August
We've looked at the most up-to-date weather data for Cornwall, 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 Cornwall weather in August.
What's the temperature like in Cornwall during August?
August is typically the warmest month in Cornwall. The temperature reaches around 18℃ during the daytime, falling away to 15℃ 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 Cornwall during August?
On average, there will be 6 rainy days during the month, amounting to 115.0mm 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 Cornwall during August?
You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during August. With moderate air temperatures, any breeze will feel cool.
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