December weather forecast and climate
Guabo, Costa Rica

Weather in December

December, the first month of the winter, in Guabo, is also a moderately hot month, with temperature in the range of an average low of 22.5°C (72.5°F) and an average high of 29.5°C (85.1°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a still warm 29.5°C (85.1°F). In Guabo, the average low-temperature is 22.5°C (72.5°F).

Heat index

The average heat index in December is appraised at a very hot 35.7°C (96.3°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, differences in body mass, height, and shape, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Guabo, during December, the rain falls for 10.7 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, there are 205 rainfall days, and 1087mm (42.8") of precipitation is accumulated.

Daylight

January and December, with an average of 11.6h of daylight, are months with the shortest days.

Sunshine

In Guabo, the average sunshine in December is 9.5h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. Months with the lowest UV index in Guabo, Costa Rica, are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in December in Guabo?

The average high-temperature, in December, is 29.5°C (85.1°F), while the average low-temperature is 22.5°C (72.5°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines relative humidity and air temperature, in December is evaluated at 35.7°C (96.3°F).

What is the average humidity in December in Guabo?

The average relative humidity in December in Guabo is 78%.

How much does it rain in Guabo in December?

In December, in Guabo, the rain falls for 10.7 days. Throughout December, 21mm (0.83") of precipitation is accumulated.

What is the month with the shortest days in Guabo?

January and December, with an average of 11.6h of daylight, are months with the shortest days in Guabo, Costa Rica.

What is the average length of the day in December in Guabo?

In December, the average length of the day in Guabo is 11.6h.

How long on average sun shines in December in Guabo?

In Guabo, the average sunshine in December is 9.5h.

What is the month with the highest UV index in Guabo?

January through December, with an average maximum UV index of 7, are months with the highest UV index.

What are the months with the lowest UV index in Guabo?

Months with the lowest UV index in Guabo are January through December, with an average maximum UV index of 7.

What is the UV index reading in December in Guabo?

The average daily maximum UV index in December in Guabo is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in December
Guabo, Costa Rica

Average temperature in December - Guabo, Costa Rica
  • Average high temperature in December: 29.5°C

The warmest month (with the highest average high temperature) is March (32.4°C).
The month with the lowest average high temperature is October (28.2°C).

  • Average low temperature in December: 22.5°C

The month with the highest average low temperature is May (25.6°C).
The coldest month (with the lowest average low temperature) is January (22.4°C).

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Average pressure in December
Guabo, Costa Rica

Average pressure in December - Guabo, Costa Rica
  • Average pressure in December: 1010.3mbar

The month with the highest atmospheric pressure is January (1010.7mbar).
Months with the lowest atmospheric pressure are April and November (1010.1mbar).

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Average wind speed in December
Guabo, Costa Rica

Average wind speed in December - Guabo, Costa Rica
  • Average wind speed in December: 10.5km/h

The windiest months (with the highest average wind speed) are January and February (11.9km/h).
The calmest month (with the lowest average wind speed) is September (6.9km/h).

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Average humidity in December
Guabo, Costa Rica

Average humidity in December - Guabo, Costa Rica
  • Average humidity in December: 78%

The month with the highest relative humidity is October (85%).
The month with the lowest relative humidity is March (65%).

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Average rainfall in December
Guabo, Costa Rica

Average rainfall in December - Guabo, Costa Rica
  • Average rainfall in December: 21mm

The wettest month (with the highest rainfall) is October (241mm).
The driest month (with the least rainfall) is February (3mm).

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Average rainfall days in December
Guabo, Costa Rica

Average rainfall days in December - Guabo, Costa Rica
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is August (25.8 days).
The month with the least rainy days is February (2.2 days).

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Average daylight in December /
Average sunshine in December
Guabo, Costa Rica

Average daylight in December / Average sunshine in December - Guabo, Costa Rica
  • Average daylight in December: 11.6h

The month with the longest days is June (Average daylight: 12.7h).
Months with the shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in December: 9.5h

The month with the most sunshine is March (Average sunshine: 9.9h).
The month with the least sunshine is October (Average sunshine: 7h).

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Average sunshine days in December
Guabo, Costa Rica

Average sunshine days in December - Guabo, Costa Rica
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is March (26.2 days).
The month with the least sunshine days is October (3.9 days).

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Average UV index in December
Guabo, Costa Rica

Average UV index in December - Guabo, Costa Rica
  • Average UV index in December: 7

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average cloud cover in December
Guabo, Costa Rica

Average cloud cover in December - Guabo, Costa Rica
  • Average cloud cover in December: 22

The month with the most cloud cover is October (Cloud cover 53).
The month with the least cloud cover is February (Cloud cover 12).

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Average visibility in December
Guabo, Costa Rica

Average visibility in December - Guabo, Costa Rica
  • Average visibility in December: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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