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August Weather in Costa Rica, Mexico

Last updated: August 26, 2025

The average temperature in Costa Rica, Mexico during August is a pleasant 24°C (76°F). Expect minimums dipping to 17°C (64°F) and maximums soaring up to 35°C (95°F). With precipitation totaling 137 mm (5.4 in) over approximately 18 days, the average humidity hovers around a lush 82%.

August Temperature in Costa Rica

In August in Costa Rica, the average temperature is 24°C (76°F), with maximums reaching up to 35°C (95°F) and minimums dipping as low as 17°C (64°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy the outdoor attractions.

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 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 17°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec707275787875757675737270
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 total precipitation amount is 137 mm (5.4 in) over the course of 18 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 137 mm (5.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec138621118305811372161804214
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 82%. With an average temperature of 24°C (76°F), this humidity feels like wearing a warm, damp blanket, making travel uncomfortable and sticky as you explore.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%68%59%57%65%66%75%82%82%83%80%76%
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 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Costa Rica, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11131415141415141413119
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 Weather21°C (70°F)13 mm (0.5 inches)76%extreme
February Weather22°C (72°F)8 mm (0.3 inches)68%extreme
March Weather24°C (75°F)6 mm (0.2 inches)59%extreme
April Weather26°C (78°F)21 mm (0.8 inches)57%extreme
May Weather26°C (79°F)118 mm (4.6 inches)65%extreme
June Weather24°C (75°F)305 mm (12.0 inches)66%extreme
July Weather24°C (76°F)81 mm (3.2 inches)75%extreme
August Weather24°C (76°F)137 mm (5.4 inches)82%extreme
September Weather24°C (75°F)216 mm (8.5 inches)82%extreme
October Weather23°C (74°F)180 mm (7.1 inches)83%extreme
November Weather22°C (72°F)42 mm (1.6 inches)80%extreme
December Weather21°C (71°F)14 mm (0.5 inches)76%very high

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