San José
Costa Rica
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
San José, Costa Rica

An aerial skyscape of San José, Costa Rica in the evening sun
An aerial skyscape of San José, Costa Rica in the evening sun
May, the last month of the spring, in San José, is another warm month, with average temperature ranging between min 19°C (66.2°F) and max 27.6°C (81.7°F).

Temperature

In May, the average high-temperature is almost the same as in April - a still warm 27.6°C (81.7°F). In San José, Costa Rica, in May, the average low-temperature is 19°C (66.2°F).

Rainfall

In San José, during 13 rainfall days, 267.6mm (10.5") of precipitation is typically accumulated. In San José, during the entire year, the rain falls for 107 days and collects up to 1971mm (77.6") of precipitation.

Daylight

The average length of the day in San José is 12.6h.

Sunshine

In May, the average sunshine in San José is 5.9h.

UV index

Months with the highest UV index in San José are February through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
In May, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Protect yourself by liberally applying a sunscreen of at least 30 SPF. Sunscreen prevents sunburn and decreases the damaging effects of Sun's radiation on the immune system.

What is the temperature in May in San José?

In May, the average high-temperature is 27.6°C (81.7°F), and the average low-temperature is 19°C (66.2°F).

How many days does it rain in May in San José?

In San José, in May, it is raining for 13 days, with typically 267.6mm (10.5") of accumulated precipitation.

How many hours of daylight does San José have in May?

The average length of the day in May in San José, Costa Rica, is 12.6h.

How long on average sun shines in May in San José?

The average sunshine in May in San José, Costa Rica, is 5.9h.

What are the months with the highest UV index in San José?

February through October, with an average maximum UV index of 12, are months with the highest UV index in San José.

What is the UV index intensity in May in San José?

The average daily maximum UV index in May in San José is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from the exposure to the Sun's UV radiation.
Average temperature in May - San José, Costa Rica
  • Average high temperature in May: 27.6°C

The warmest month (with the highest average high temperature) is April (28.4°C).
The month with the lowest average high temperature is December (25.9°C).

  • Average low temperature in May: 19°C

Months with the highest average low temperature are May and July (19°C).
The coldest month (with the lowest average low temperature) is January (17.8°C).

Average rainfall in May - San José, Costa Rica
  • Average rainfall in May: 267.6mm

The wettest month (with the highest rainfall) is September (355.1mm).
The driest month (with the lowest rainfall) is January (6.3mm).

Average rainfall days in May - San José, Costa Rica
  • Average rainfall days in May: 13 days

The month with the highest number of rainy days is September (18 days).
Months with the lowest number of rainy days are January and February (1 days).

Average daylight in May / Average sunshine in May - San José, Costa Rica
  • Average daylight in May: 12.6h

The month with the longest days is June (Average daylight: 12.7h).
Months with shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in May: 5.9h

The month with most sunshine is February (Average sunshine: 9.5h).
The month with least sunshine is June (Average sunshine: 4.8h).

Average UV index in May - San José, Costa Rica
  • Average UV index in May: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).