December weather forecast
San Pedro, Costa Rica

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Weather in December

The weather patterns in December change significantly, with rainfall reducing further to 65mm (2.56"). A gradual increase in daylight hours and wind speeds signals the onset of the dry season. However, relative humidity remains relatively high, factoring in a touch of tropical weather. Averaging at a maximum speed of 9.4km/h (5.8mph), the wind speed's noticeable increase distinguishes December's weather. The month, therefore, sees San Pedro transitioning fully into the anticipated drier season.

Temperature

December's advent denotes a minor fluctuation in the average high-temperature to a moderately hot 23.4°C (74.1°F) from November's 22.7°C (72.9°F). During the month of December, an average low-temperature of 14°C (57.2°F) is recorded in San Pedro.

Humidity

In San Pedro, the average relative humidity in December is 84%.

Rainfall

In San Pedro, in December, during 19.5 rainfall days, 65mm (2.56") of precipitation is typically 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

The month with the shortest days is December, with an average of 11h and 36min of daylight.
On the first day of the month, sunrise is at 05:37 and sunset at 17:13. On the last day of December, in San Pedro, sunrise is at 05:52 and sunset at 17:26 CST.

Sunshine

The average sunshine in December in San Pedro is 7.8h.

UV index

The months with the highest UV index 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 value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A daily high UV index of 5 in December leads to these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.

Frequently asked questions

What is the average December temperature in San Pedro?

The average high-temperature, in December, in San Pedro, is 23.4°C (74.1°F), while the average low-temperature is 14°C (57.2°F).

What is the average humidity in December in San Pedro?

In San Pedro, Costa Rica, the average relative humidity in December is 84%.

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

In December, the rain falls for 19.5 days. Throughout December, 65mm (2.56") of precipitation is accumulated.

What is the month with the shortest days in San Pedro?

With an average of 11h and 36min of daylight, December has the shortest days of the year in San Pedro, Costa Rica.

What is the average length of the day in December in San Pedro?

In December, the average day length in San Pedro is 11h and 34min.

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

On the first day of December in San Pedro, sunrise is at 05:37 and sunset at 17:13. On the last day of the month, sunrise is at 05:52 and sunset at 17:26 CST.

How many hours of sunshine does San Pedro have in December?

The average sunshine duration in December is 7.8h.

What is the month with the highest UV index in San Pedro?

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

What are the months with 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 in San Pedro.

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

In December, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.

Average temperature in December
San Pedro, Costa Rica

Average temperature in December - San Pedro, Costa Rica
  • Average high temperature in December: 23.4°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 December: 14°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 December
San Pedro, Costa Rica

Average pressure in December - San Pedro, Costa Rica
  • Average pressure in December: 1011.7mbar

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 December
San Pedro, Costa Rica

Average wind speed in December - San Pedro, Costa Rica
  • Average wind speed in December: 9km/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 December
San Pedro, Costa Rica

Average humidity in December - San Pedro, Costa Rica
  • Average humidity in December: 84%

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 December
San Pedro, Costa Rica

Average rainfall in December - San Pedro, Costa Rica
  • Average rainfall in December: 65mm

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

Average rainfall days in December
San Pedro, Costa Rica

Average rainfall days in December - San Pedro, Costa Rica
  • Average rainfall days in December: 19.5 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 December /
Average sunshine in December
San Pedro, Costa Rica

Average daylight in December / Average sunshine in December - San Pedro, Costa Rica
  • Average daylight in December: 11h 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 December: 7h 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 December
San Pedro, Costa Rica

Average sunshine days in December - San Pedro, Costa Rica
  • Average sunshine days in December: 9.1 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 December
San Pedro, Costa Rica

Average UV index in December - San Pedro, Costa Rica
  • Average UV index in December: 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 December
San Pedro, Costa Rica

Average cloud cover in December - San Pedro, Costa Rica
  • Average cloud cover in December: 45

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 December
San Pedro, Costa Rica

Average visibility in December - San Pedro, Costa Rica
  • Average visibility in December: 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).

San Pedro, Costa Rica

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