May weather forecast
San José, Costa Rica

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

Weather in May

The last month of the spring, May, is another warm month in San José, Costa Rica, with an average temperature varying between 16.9°C (62.4°F) and 24.3°C (75.7°F).

Temperature

In May, the average high-temperature is almost the same as in April - a still warm 24.3°C (75.7°F). In San José, the average low-temperature is 16.9°C (62.4°F).

Humidity

In San José, the average relative humidity in May is 86%.

Rainfall

In San José, during 28.7 rainfall days, 369mm (14.53") of precipitation is typically accumulated. Throughout the year, in San José, Costa Rica, there are 287.8 rainfall days, and 2585mm (101.77") of precipitation is accumulated.

Daylight

In San José, Costa Rica, the average length of the day in May is 12h and 35min.
On the first day of the month, sunrise is at 05:19 and sunset at 17:47. On the last day of May, in San José, sunrise is at 05:14 and sunset at 17:53 CST.

Sunshine

The average sunshine in May in San José is 6.9h.

UV index

The months with the highest UV index in San José are January through December, with an average maximum UV index of 5. The months with the lowest UV index in San José are January through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in San José?

The average high-temperature, in May, in San José, is 24.3°C (75.7°F), while the average low-temperature is 16.9°C (62.4°F).

What is the average humidity in May in San José?

In May, the average relative humidity in San José, Costa Rica, is 86%.

How much does it rain in San José in May?

In San José, in May, it is raining for 28.7 days, with typically 369mm (14.53") of accumulated precipitation.

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

The average day length in May in San José is 12h and 35min.

What time are sunrise and sunset in May in San José?

On the first day of May in San José, sunrise is at 05:19 and sunset at 17:47. On the last day of the month, sunrise is at 05:14 and sunset at 17:53 CST.

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

The average sunshine duration in May is 6.9h.

When is the highest UV index in San José?

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

When is the lowest UV index in San José?

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

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

The average daily maximum UV index in May in San José is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in May
San José, Costa Rica

Average temperature in May - San José, Costa Rica
  • Average high temperature in May: 24.3°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 May: 16.9°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 May
San José, Costa Rica

Average pressure in May - San José, Costa Rica
  • Average pressure in May: 1011.2mbar

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 May
San José, Costa Rica

Average wind speed in May - San José, Costa Rica
  • Average wind speed in May: 5.1km/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 May
San José, Costa Rica

Average humidity in May - San José, Costa Rica
  • Average humidity in May: 86%

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 May
San José, Costa Rica

Average rainfall in May - San José, Costa Rica
  • Average rainfall in May: 369mm

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 May
San José, Costa Rica

Average rainfall days in May - San José, Costa Rica
  • Average rainfall days in May: 28.7 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 May /
Average sunshine in May
San José, Costa Rica

Average daylight in May / Average sunshine in May - San José, Costa Rica
  • Average daylight in May: 12h and 35min

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 34min).

  • Average sunshine in May: 6h and 54min

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 May
San José, Costa Rica

Average sunshine days in May - San José, Costa Rica
  • Average sunshine days in May: 1.8 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 May
San José, Costa Rica

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

Average cloud cover in May - San José, Costa Rica
  • Average cloud cover in May: 59

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 May
San José, Costa Rica

Average visibility in May - San José, Costa Rica
  • Average visibility in May: 7km

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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