Costa Rica weather

Our guide to the weather in Costa Rica during August

24

Average high

5

UV Index

796mm

Monthly rainfall

89%

Humidity

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

How warm is it in Costa Rica during August?

The temperature reaches around 24℃ during the daytime in August, 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 Costa Rica during August?

On average, there will be 25 rainy days during the month, amounting to 795.8mm in total. That's a lot of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a good chance that you'll catch a thunderstorm during your trip.

Is it windy in Costa Rica during August?

No - there is very light air movement in August so conditions should be calm with light breezes at times.

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Weather in Costa Rica

Our month-by-month guide to the weather and climate in Costa Rica

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