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

April 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
April, like March, in San José, Costa Rica, is a moderately hot spring month, with average temperature varying between 18.8°C (65.8°F) and 28.4°C (83.1°F).

Temperature

The warmest month is April, with an average high-temperature of 28.4°C (83.1°F) and an average low-temperature of 18.8°C (65.8°F).

Rainfall

In San José, in April, during 4 rainfall days, 79.9mm (3.1") of precipitation is typically accumulated. Throughout the year, in San José, there are 107 rainfall days, and 1971mm (77.6") of precipitation is accumulated.

Daylight

In San José, the average length of the day is 12.4h.

Sunshine

The average sunshine in San José is 8h.

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 extreme health hazard from the exposure to the Sun's UV radiation for the ordinary person.
The average daily UV index of 12 in April transform into the following instructions:
Take all necessary precautions, as unprotected skin 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used.

What is the warmest month in San José?

With an average high-temperature of 28.4°C (83.1°F) and an average low-temperature of 18.8°C (65.8°F), April is the warmest month in San José, Costa Rica.

What is the temperature in April in San José?

The average high-temperature, in April, in San José, Costa Rica, is 28.4°C (83.1°F), while the average low-temperature is 18.8°C (65.8°F).

How much does it rain in San José in April?

In San José, Costa Rica, in April, it is raining for 4 days, with typically 79.9mm (3.1") of accumulated precipitation.

What is the average length of the day in April in San José?

In San José, the average length of the day in April is 12.4h.

How many hours of sunshine does San José have in April?

In April, the average sunshine in San José, Costa Rica, is 8h.

When is 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.

What is the UV index reading in April in San José?

In San José, Costa Rica, the average daily maximum UV index in April is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unprotected exposure to the UV radiation.
Average temperature in April - San José, Costa Rica
  • Average high temperature in April: 28.4°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 April: 18.8°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 April - San José, Costa Rica
  • Average rainfall in April: 79.9mm

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 April - San José, Costa Rica
  • Average rainfall days in April: 4 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 April / Average sunshine in April - San José, Costa Rica
  • Average daylight in April: 12.4h

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 April: 8h

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 April - San José, Costa Rica
  • Average UV index in April: 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).