May weather forecast
San Pedro, Costa Rica

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Weather in May

May brings with it the peak wet period in San Pedro, marked by a considerable increase in rainfall to 369mm (14.53"). Higher levels of humidity, reaching 86%, combine with the steadily warming temperatures to lay the foundation for this month's weather character. As the cloud coverage increases, the visibility drops, indicating heavier, more frequent showers. Even with these weather conditions, the daylight hours and UV index remain relatively constant. Change in wind patterns is negligible, indicating stable weather conditions despite increased precipitation.

Temperature

May's beginning signals an average high-temperature of a still warm 24.3°C (75.7°F), barely different from April's 26°C (78.8°F). In San Pedro, May nights cool down to an average of 16.9°C (62.4°F).

Humidity

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

Rainfall

In May, in San Pedro, the rain falls for 28.7 days. Throughout May, 369mm (14.53") of precipitation is accumulated. In San Pedro, during the entire year, the rain falls for 287.8 days and collects up to 2585mm (101.77") of precipitation.

Daylight

In San Pedro, 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 17:47. On the last day of the month, sunrise is at 05:14 and sunset at 17:54 CST.

Sunshine

The average sunshine in May is 6.9h.

UV index

January through December, with an average maximum UV index of 5, are months with the highest UV index in San Pedro. The months with the lowest UV index are January through December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: An average UV index of 5 in May transforms into this advice:
Guard yourself - Avoiding sunburn is suggested. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Jan 26, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the temperature in May in San Pedro?

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

What is the average humidity in May in San Pedro?

The average relative humidity in May in San Pedro is 86%.

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

In San Pedro, Costa Rica, 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 Pedro?

In San Pedro, Costa Rica, the average day length in May is 12h and 35min.

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

In May, on the first day of the month, sunrise is at 05:18 and sunset at 17:47. On the last day of the month, in San Pedro, Costa Rica, sunrise is at 05:14 and sunset at 17:54 CST.

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

The average sunshine duration in May is 6.9h.

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

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

When is the lowest UV index in San Pedro?

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

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

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health 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 May
San Pedro, Costa Rica

Average temperature in May - San Pedro, 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).

Average pressure in May
San Pedro, Costa Rica

Average pressure in May - San Pedro, 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).

Average wind speed in May
San Pedro, Costa Rica

Average wind speed in May - San Pedro, 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).

Average humidity in May
San Pedro, Costa Rica

Average humidity in May - San Pedro, 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%).

Average rainfall in May
San Pedro, Costa Rica

Average rainfall in May - San Pedro, 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).

Average rainfall days in May
San Pedro, Costa Rica

Average rainfall days in May - San Pedro, 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).

Average daylight in May /
Average sunshine in May
San Pedro, Costa Rica

Average daylight in May / Average sunshine in May - San Pedro, 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).

Average sunshine days in May
San Pedro, Costa Rica

Average sunshine days in May - San Pedro, 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).

Average UV index in May
San Pedro, Costa Rica

Average UV index in May - San Pedro, 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).

Average cloud cover in May
San Pedro, Costa Rica

Average cloud cover in May - San Pedro, 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).

Average visibility in May
San Pedro, Costa Rica

Average visibility in May - San Pedro, 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).

San Pedro, Costa Rica

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