May Weather in San Marcos

Last updated: March 2, 2024

The weather in San Marcos, Costa Rica, during May is characterized by an average temperature of 18°C (65°F). Highs can soar to 24°C (76°F), while lows may dip to 15°C (58°F). Typically, the humidity level in San Marcos throughout May hovers around 69%.

15°C (58°F)

Minimum temperature

18°C (65°F)

Average temperature

24°C (76°F)

Maximum temperature

69%

Humidity

Precipitation and Sunshine hours

In May, San Marcos averages 532 mm (21.0 inches) of rainfall, typically over the course of 29 rainy days. The month enjoys an average of 12 hours 33 minutes of daylight, with the sun shining for approximately 7 hours 10 minutes each day. Additionally, there is a 12% probability of sunny days during this period.

532 mm (21.0 inches)

Precipitation

29 rainy days

Rainy days

7 hours 10 minutes

Sunshine hours

12%

Chance of sun

UV Index

In May, the UV Index in San Marcos reaches a maximum of 15, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 2 5 9 13 15 15 13 9 5 2 1 0 0
Exposure Low Moderate VeryHigh Extreme VeryHigh Moderate Low
Time to burn 45 min 30 min 15 min 10 min 15 min 30 min 45 min

Compare San Marcos's Climate with Cities Worldwide