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December Weather in Tejar, Costa Rica

Last updated: August 23, 2025

In Tejar, Costa Rica, the average temperature in December hovers around 21°C (71°F), providing a pleasant climate for visitors. Expect temperatures to range from a comfortable 16°C (62°F) to a warm 27°C (80°F). However, be prepared for wet weather, as the region receives an average precipitation of 253 mm (10.0 in) over 28 days, and humidity levels tend to be around 72%.

December Temperature in Tejar

In December in Tejar, the average temperature is 21°C (71°F), with maximums reaching up to 27°C (80°F) and minimums dipping as low as 16°C (62°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy all that Tejar has to offer.

December Weather in Tejar: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Tejar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tejar, December typically has an average temperature of 21°C (71°F), with highs reaching up to 27°C (80°F) and lows dropping to around 16°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec707172727272717171707070
Data source: Temperature data for Tejar generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Tejar

In Tejar in December, the total precipitation amount is 253 mm (10.0 in) spread over a period of 28 days.

December Precipitation Trends in Tejar

The chart displays monthly precipitation patterns in Tejar, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Tejar, December typically receives around 253 mm (10.0 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec1166574253706651683762853873503253
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tejar

In Tejar in December, humidity is 72%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, creating a thick, sultry atmosphere that can be quite heavy for traveling.

December Average Humidity in Tejar

This chart illustrates the average monthly humidity levels in Tejar, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Tejar is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%68%66%67%69%84%85%82%81%80%80%73%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tejar

In Tejar in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Tejar.

Maximum UV Index Levels in Tejar for December

The chart shows the monthly maximum UV Index (UVI) for Tejar in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Tejar typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111314141514141313131110
Data source: Tejar December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Tejar Compares to Other Months

Weather in Tejar varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tejar, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Tejar, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (71°F)116 mm (4.6 inches)68%extreme
February Weather22°C (71°F)65 mm (2.5 inches)68%extreme
March Weather22°C (72°F)74 mm (2.9 inches)66%extreme
April Weather22°C (72°F)253 mm (10.0 inches)67%extreme
May Weather22°C (72°F)706 mm (27.8 inches)69%extreme
June Weather22°C (72°F)651 mm (25.6 inches)84%extreme
July Weather22°C (72°F)682 mm (26.9 inches)85%extreme
August Weather22°C (71°F)762 mm (30.0 inches)82%extreme
September Weather21°C (71°F)853 mm (33.6 inches)81%extreme
October Weather21°C (70°F)873 mm (34.4 inches)80%extreme
November Weather21°C (71°F)503 mm (19.8 inches)80%extreme
December Weather21°C (71°F)253 mm (10.0 inches)72%very high

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