nomadseason

May Weather in Costa Rica, Peru

Last updated: August 27, 2025

In May, the average temperature in Costa Rica, Peru hovers around 25°C (76°F), offering a pleasant climate. Expect the minimum to dip to 16°C (62°F), while it can peak at a sizzling 33°C (92°F). With an average precipitation of 148 mm (5.8 in) spread over 17 days, be prepared for occasional showers. The air feels quite humid, with an average humidity of 86%, creating a warm and tropical atmosphere.

May Temperature in Costa Rica

In May, in Costa Rica, the average temperature is 25°C (76°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 16°C (62°F). This makes Costa Rica an ideal destination for travelers seeking pleasant weather and a comfortable climate.

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 25°C (76°F), with highs reaching up to 33°C (92°F) and lows dropping to around 16°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777777675757778797877
Data source: Temperature data for Costa Rica generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 148 mm (5.8 in) spread over 17 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 148 mm (5.8 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec21721224217414894626153146247220
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Costa Rica

In Costa Rica in May humidity is 86%. With an average temperature of 25°C (76°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and dress in light, breathable clothing.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%76%81%86%86%70%47%37%42%62%76%89%
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 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 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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616161411111214151414
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 Weather25°C (77°F)217 mm (8.5 inches)80%extreme
February Weather25°C (77°F)212 mm (8.4 inches)76%extreme
March Weather25°C (77°F)242 mm (9.5 inches)81%extreme
April Weather25°C (77°F)174 mm (6.9 inches)86%extreme
May Weather25°C (76°F)148 mm (5.8 inches)86%extreme
June Weather24°C (76°F)94 mm (3.7 inches)70%extreme
July Weather24°C (75°F)62 mm (2.5 inches)47%extreme
August Weather25°C (77°F)61 mm (2.4 inches)37%extreme
September Weather26°C (79°F)53 mm (2.1 inches)42%extreme
October Weather26°C (79°F)146 mm (5.7 inches)62%extreme
November Weather25°C (78°F)247 mm (9.7 inches)76%extreme
December Weather25°C (78°F)220 mm (8.7 inches)89%extreme

Compare Costa Rica's Climate with Cities Worldwide