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May Weather in Costa Rica, Brazil

Last updated: August 22, 2025

In Costa Rica, Brazil, the average temperature in May is a pleasant 20°C (68°F). During this time, you can expect temperatures to range from a chilly 5°C (42°F) to a warm 33°C (92°F). Be prepared for some rain, as the area receives about 98 mm (3.9 in) of precipitation over 9 days. With an average humidity of 67%, it's a great idea to pack accordingly and enjoy the local climate!

May Temperature in Costa Rica

In May in Costa Rica, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop to as low as 5°C (42°F). This makes Costa Rica an ideal destination for travelers looking to enjoy a mix of warm days and cool nights.

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

The chart illustrates May 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, May typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 5°C (42°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.

May Precipitation in Costa Rica

In Costa Rica in May, the precipitation amount is 98 mm (3.9 in) spread over a duration of 9 days.

May Precipitation Trends in Costa Rica

The chart displays monthly precipitation patterns in Costa Rica, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Costa Rica, May typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec160131146639888239557176100216
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Costa Rica

In Costa Rica in May humidity is 67%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, as the air clings to your skin and invites you to enjoy the sights at a leisurely pace.

May Average Humidity in Costa Rica

This chart illustrates the average monthly humidity levels in Costa Rica, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Costa Rica is approximately 67%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Costa Rica

In Costa Rica in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Costa Rica.

Maximum UV Index Levels in Costa Rica for May

The chart shows the monthly maximum UV Index (UVI) for Costa Rica in May, 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 May, the maximum UV index in Costa Rica typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15151311867911141515
Data source: Costa Rica May 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 May 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 May’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 May’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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