December weather forecast
Palmares, Costa Rica

December

Weather in December

December, the first month of the winter in Palmares, is also a moderately hot month, with an average temperature fluctuating between 26.5°C (79.7°F) and 17.2°C (63°F).

Temperature

In December, Palmares experiences a minor shift in meteorological conditions with average high-temperatures marked at a still warm 26.5°C (79.7°F), closely mirroring the climate in November. Throughout December nights, Palmares registers an average low-temperature of 17.2°C (63°F).

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Palmares, during December, the rain falls for 18.3 days and regularly aggregates up to 46mm (1.81") of precipitation. Throughout the year, there are 272 rainfall days, and 2217mm (87.28") of precipitation is accumulated.

Daylight

The month with the shortest days is December, with an average of 11h and 30min of daylight.
On the first day of December, sunrise is at 05:39 and sunset at 17:14. On the last day of the month, sunrise is at 05:54 and sunset at 17:27 CST.

Sunshine

In December, the average sunshine is 8.7h.

UV index

January through April, June, July, September, October and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 6 during December translates into these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Enhance your sun protection with tightly woven, yet airy clothing.

Frequently asked questions

What is the temperature in December?
In Palmares, in December, the average high-temperature is 26.5°C (79.7°F), and the average low-temperature is 17.2°C (63°F). In May, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 32°C (89.6°F).
What is the average humidity in December?
In Palmares, the average relative humidity in December is 81%.
How many days does it rain in December?
In Palmares, in December, during 18.3 rainfall days, 46mm (1.81") of precipitation is typically accumulated.
What is the month with the shortest days?
With an average of 11h and 30min of daylight, December has the shortest days of the year.
What is the average length of the day in December in Palmares?
The average day length in December is 11h and 33min.
When are sunrise and sunset in December?
On the first day of December, sunrise is at 05:39 and sunset at 17:14. On the last day of the month, sunrise is at 05:54 and sunset at 17:27 CST.
How long on average sun shines in December?
The average sunshine duration in December is 8.7h.
When is the highest UV index?
January through April, June, July, September, October and December, with an average maximum UV index of 6, are months with the highest UV index.
What is the UV index intensity in December?
In Palmares, the average daily maximum UV index in December is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Palmares, Costa Rica
  • Average high temperature in December: 26.5°C

The warmest months (with the highest average high temperature) are March and April (29.7°C).
The month with the lowest average high temperature is October (25.4°C).

  • Average low temperature in December: 17.2°C

The month with the highest average low temperature is May (19.8°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).

Average pressure in December
Palmares, Costa Rica
  • Average pressure in December: 1011.5mbar

The month with the highest atmospheric pressure is January (1012.1mbar).
The month with the lowest atmospheric pressure is October (1010.7mbar).

Average wind speed in December
Palmares, Costa Rica
  • Average wind speed in December: 8.7km/h

The windiest month (with the highest average wind speed) is February (10.6km/h).
The calmest month (with the lowest average wind speed) is September (3.8km/h).

Average humidity in December
Palmares, Costa Rica
  • Average humidity in December: 81%

The month with the highest relative humidity is October (89%).
The month with the lowest relative humidity is March (70%).

Average rainfall in December
Palmares, Costa Rica
  • Average rainfall in December: 46mm

The wettest month (with the highest rainfall) is October (396mm).
The driest month (with the least rainfall) is February (17mm).

Average rainfall days in December
Palmares, Costa Rica
  • Average rainfall days in December: 18.3 days

The month with the highest number of rainy days is October (30.2 days).
The month with the least rainy days is February (10.3 days).

Average daylight in December /
Average sunshine in December
Palmares, Costa Rica
  • Average daylight in December: 11h and 3min

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 30min).

  • Average sunshine in December: 8h and 4min

The month with the most sunshine is March (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 7h and 0min).

Average sunshine days in December
Palmares, Costa Rica
  • Average sunshine days in December: 10.1 days

The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is September (0.5 days).

Average UV index in December
Palmares, Costa Rica
  • Average UV index in December: 6

The months with the highest UV index are January, February, March, April, June, July, September, October and December (UV index 6).
The months with the lowest UV index are May, August and November (UV index 5).

Average cloud cover in December
Palmares, Costa Rica
  • Average cloud cover in December: 33

The month with the most cloud cover is October (Cloud cover 54).
The month with the least cloud cover is February (Cloud cover 19).

Average visibility in December
Palmares, Costa Rica
  • Average visibility in December: 9km

The months with the highest visibility are February and March (10km).
The months with the lowest visibility are August, September, October and November (7km).

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