April weather forecast
San José, Costa Rica

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Skyscape of San José, Costa Rica in the evening sun
Skyscape of San José, Costa Rica in the evening sun

Weather in April

April spells a noteworthy shift in San José's climate. There is a small rise in temperature, cresting at 26°C (78.8°F), the warmest so far for the year. Concurrently, the city experiences a significant upturn in rainfall, a stark shift from the drier first quarter of the year. Despite this change, the warmth and lush green surroundings make for a beguiling combination in San José during April.

Temperature

April, recognised by an average high temperature of 26°C (78.8°F) and a low of 15.9°C (60.6°F), is San José's warmest month.

Humidity

In San José, Costa Rica, the average relative humidity in April is 78%.

Rainfall

In San José, in April, during 21.9 rainfall days, 100mm (3.94") of precipitation is typically accumulated. In San José, during the entire year, the rain falls for 287.8 days and collects up to 2585mm (101.77") of precipitation.

Daylight

In San José, the average length of the day in April is 12h and 21min.
On the first day of the month, sunrise is at 05:33 and sunset at 17:46. On the last day of April, in San José, Costa Rica, sunrise is at 05:19 and sunset at 17:47 CST.

Sunshine

In San José, Costa Rica, the average sunshine in April is 8.6h.

UV index

January through December, with an average maximum UV index of 5, are months with the highest UV index. January through December, with an average maximum UV index of 5, are months with the lowest UV index in San José. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: In April, the average maximum UV index of 5 translates into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Jan 26, 2024 | Published by: Weather Atlas | Resources

Frequently asked questions

What is the warmest month in San José?

San José's warmest month, April, registers temperatures that range from a high of 26°C (78.8°F) to a low of 15.9°C (60.6°F).

What is the average April temperature in San José?

An average high-temperature, in April, in San José, is 26°C (78.8°F) and the average low-temperature is 15.9°C (60.6°F).

What is the average humidity in April in San José?

The average relative humidity in April in San José is 78%.

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

In April, in San José, the rain falls for 21.9 days. Throughout April, 100mm (3.94") of precipitation is accumulated.

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

In April, the average day length in San José, Costa Rica, is 12h and 21min.

When is the sunrise / sunset in April in San José?

On the first day of April, sunrise is at 05:33 and sunset at 17:46. On the last day of the month, sunrise is at 05:19 and sunset at 17:47 CST.

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

The average sunshine duration in April in San José is 8.6h.

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

The months with the highest UV index in San José are January through December, with an average maximum UV index of 5.

What is the month with the lowest UV index in San José?

January through December, with an average maximum UV index of 5, are months with the lowest UV index.

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

In April, the average daily maximum UV index in San José, Costa Rica, is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
San José, Costa Rica

Average temperature in April - San José, Costa Rica
  • Average high temperature in April: 26°C

The warmest month (with the highest average high temperature) is April (26°C).
The month with the lowest average high temperature is October (22.4°C).

  • Average low temperature in April: 15.9°C

The month with the highest average low temperature is June (17°C).
The coldest month (with the lowest average low temperature) is January (13.8°C).

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Average pressure in April
San José, Costa Rica

Average pressure in April - San José, Costa Rica
  • Average pressure in April: 1011.5mbar

The month with the highest atmospheric pressure is January (1012.3mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).

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Average wind speed in April
San José, Costa Rica

Average wind speed in April - San José, Costa Rica
  • Average wind speed in April: 7km/h

The windiest month (with the highest average wind speed) is February (10.7km/h).
The calmest month (with the lowest average wind speed) is September (4.3km/h).

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Average humidity in April
San José, Costa Rica

Average humidity in April - San José, Costa Rica
  • Average humidity in April: 78%

The months with the highest relative humidity are September and October (91%).
The months with the lowest relative humidity are February and March (75%).

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Average rainfall in April
San José, Costa Rica

Average rainfall in April - San José, Costa Rica
  • Average rainfall in April: 100mm

The wettest month (with the highest rainfall) is October (438mm).
The driest month (with the least rainfall) is February (26mm).

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Average rainfall days in April
San José, Costa Rica

Average rainfall days in April - San José, Costa Rica
  • Average rainfall days in April: 21.9 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (12.2 days).

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Average daylight in April /
Average sunshine in April
San José, Costa Rica

Average daylight in April / Average sunshine in April - San José, Costa Rica
  • Average daylight in April: 12h and 2min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).

  • Average sunshine in April: 8h and 4min

The month with the most sunshine is February (Average sunshine: 9h and 12min).
The month with the least sunshine is October (Average sunshine: 5h and 48min).

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Average sunshine days in April
San José, Costa Rica

Average sunshine days in April - San José, Costa Rica
  • Average sunshine days in April: 6.4 days

The month with the most sunshine days is March (13.5 days).
The month with the least sunshine days is September (0.1 days).

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Average UV index in April
San José, Costa Rica

Average UV index in April - San José, Costa Rica
  • Average UV index in April: 5

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).

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Average cloud cover in April
San José, Costa Rica

Average cloud cover in April - San José, Costa Rica
  • Average cloud cover in April: 42

The month with the most cloud cover is October (Cloud cover 68).
The month with the least cloud cover is February (Cloud cover 30).

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Average visibility in April
San José, Costa Rica

Average visibility in April - San José, Costa Rica
  • Average visibility in April: 8km

The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are August, September, October and November (6km).

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San José, Costa Rica

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