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August Weather in Costa Rica, Brazil

Last updated: August 22, 2025

In Costa Rica, Brazil, the average temperature in August is a pleasant 20°C (68°F). Expect a range with a minimum of 3°C (37°F) and a maximum soaring up to 37°C (98°F). During this time, the city receives about 94 mm (3.7 in) of precipitation over 6 days, contributing to an average humidity of 42%. Perfect for enjoying the warmth while staying hydrated!

August Temperature in Costa Rica

In August in Costa Rica, the average temperature is 20°C (68°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 3°C (37°F). This varied climate makes Costa Rica an ideal destination for travelers seeking a mix of warmth and coolness.

August Weather in Costa Rica: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Costa Rica, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Costa Rica, August typically has an average temperature of 20°C (68°F), with highs reaching up to 37°C (98°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec797877736865646775767778
Data source: Temperature data for Costa Rica generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Costa Rica

In Costa Rica in August, the precipitation amount is 94 mm (3.7 in) over the course of 6 days.

August Precipitation Trends in Costa Rica

The chart displays monthly precipitation patterns in Costa Rica, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Costa Rica, August typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec160131146639888239557176100216
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Costa Rica

In Costa Rica in August humidity is 42%. With an average temperature of 20°C (68°F), this humidity feels like a comfortable and refreshing breeze, making it ideal for traveling and exploring the local attractions without worrying about overheating.

August Average Humidity in Costa Rica

This chart illustrates the average monthly humidity levels in Costa Rica, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Costa Rica is approximately 42%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%76%67%61%52%42%42%43%68%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Costa Rica

In Costa Rica in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Costa Rica.

Maximum UV Index Levels in Costa Rica for August

The chart shows the monthly maximum UV Index (UVI) for Costa Rica in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Costa Rica typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15151311867911141515
Data source: Costa Rica August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Costa Rica Compares to Other Months

Weather in Costa Rica varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Costa Rica, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Costa Rica, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)160 mm (6.3 inches)85%extreme
February Weather25°C (78°F)131 mm (5.1 inches)83%extreme
March Weather25°C (77°F)146 mm (5.8 inches)82%extreme
April Weather23°C (73°F)63 mm (2.5 inches)76%extreme
May Weather20°C (68°F)98 mm (3.9 inches)67%very high
June Weather18°C (65°F)88 mm (3.5 inches)61%high
July Weather18°C (64°F)23 mm (0.9 inches)52%high
August Weather20°C (68°F)94 mm (3.7 inches)42%very high
September Weather24°C (75°F)57 mm (2.2 inches)42%extreme
October Weather24°C (76°F)176 mm (6.9 inches)43%extreme
November Weather25°C (77°F)100 mm (3.9 inches)68%extreme
December Weather26°C (78°F)216 mm (8.5 inches)84%extreme

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