May 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 May

In San José, May starts a pronounced rainy season, showing the city's lush and verdant side. A peak in rainfall sees the city drenched with 369mm (14.53") of precipitation throughout the month. As temperatures take a slight dip, May's cool nights and rain-soaked days create a particular atmosphere. Despite this, the city's charm remains unphased, offering a unique experience for residents and visitors alike.

Temperature

San José, Costa Rica, measures an average high-temperature of a still warm 24.3°C (75.7°F) in May, nearly consistent with the preceding month. May is noted for a mean low-temperature of 16.9°C (62.4°F).

Humidity

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

Rainfall

In San José, in May, during 28.7 rainfall days, 369mm (14.53") of precipitation is typically accumulated. Throughout the year, in San José, 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 May, sunrise is at 05:18 and sunset at 17:48. On the last day of the month, sunrise is at 05:14 and sunset at 17:54 CST.

Sunshine

In San José, Costa Rica, the average sunshine in May 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. January through December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: An average UV index of 5 in May transforms into this advice:
Be vigilant - Preventing sunburn is recommended. It's recommended to limit sun exposure when its radiation is at its peak during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
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Frequently asked questions

What is the usual temperature for San José in May?

In May, the average high-temperature and low-temperature in San José are 24.3°C (75.7°F) and 16.9°C (62.4°F) respectively.

What is the average humidity in May in San José?

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

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

In San José, in May, during 28.7 rainfall days, 369mm (14.53") of precipitation is typically accumulated.

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

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

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

In May, on the first day of the month, sunrise is at 05:18 and sunset at 17:48. On the last day of the month, in San José, Costa Rica, sunrise is at 05:14 and sunset at 17:54 CST.

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

In San José, the average sunshine duration in May is 6.9h.

What is the month with 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.

What is the month with 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.

How high is the UV index in May in San José?

In May, the average daily maximum UV index in San José is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to 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 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 4min

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 May: 6h and 5min

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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San José, Costa Rica

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