December weather forecast and climate
Hacienda Orosí, Costa Rica

Weather in December

December, the first month of the winter, in Hacienda Orosí, is still a warm month, with average temperature varying between 22.2°C (72°F) and 29.5°C (85.1°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a still moderately hot 29.5°C (85.1°F). In December, in Hacienda Orosí, the average low-temperature is 22.2°C (72°F).

Heat index

The average heat index is evaluated at a sweltering 35.7°C (96.3°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like differences in body mass, height, and shape, wind, metabolic differences, 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in Hacienda Orosí is 78%.

Rainfall

In Hacienda Orosí, Costa Rica, during 5.7 rainfall days, 9mm (0.35") of precipitation is typically accumulated. In Hacienda Orosí, during the entire year, the rain falls for 188.5 days and collects up to 1202mm (47.32") of precipitation.

Daylight

With an average of 11.5h of daylight, December has the shortest days of the year in Hacienda Orosí.

Sunshine

In December, the average sunshine is 9.6h.

UV index

Months with the highest UV index in Hacienda Orosí are January through October and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 Hacienda Orosí?

In Hacienda Orosí, in December, the average high-temperature is 29.5°C (85.1°F), and the average low-temperature is 22.2°C (72°F). In December, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that factores the actual air temperature with the relative humidity, is appraised at 35.7°C (96.3°F).

What is the average humidity in December in Hacienda Orosí?

In Hacienda Orosí, the average relative humidity in December is 78%.

How many days does it rain in December in Hacienda Orosí?

In Hacienda Orosí, in December, it is raining for 5.7 days, with typically 9mm (0.35") of accumulated precipitation.

What is the month with the shortest days in Hacienda Orosí?

December has the shortest days of the year, with an average of 11.5h of daylight.

What is the average length of the day in December in Hacienda Orosí?

In Hacienda Orosí, Costa Rica, the average length of the day in December is 11.5h.

How long on average sun shines in December in Hacienda Orosí?

The average sunshine in December is 9.6h.

What are the months with the highest UV index in Hacienda Orosí?

January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Hacienda Orosí, Costa Rica.

What is the UV index reading in December in Hacienda Orosí?

In December, the average daily maximum UV index in Hacienda Orosí is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in December
Hacienda Orosí, Costa Rica

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

The warmest month (with the highest average high temperature) is April (34.9°C).
The month with the lowest average high temperature is October (29°C).

  • Average low temperature in December: 22.2°C

The month with the highest average low temperature is May (24.8°C).
The coldest month (with the lowest average low temperature) is January (22°C).

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Average pressure in December
Hacienda Orosí, Costa Rica

Average pressure in December - Hacienda Orosí, Costa Rica
  • Average pressure in December: 1010.7mbar

The month with the highest atmospheric pressure is January (1011.3mbar).
The month with the lowest atmospheric pressure is October (1010.1mbar).

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Average wind speed in December
Hacienda Orosí, Costa Rica

Average wind speed in December - Hacienda Orosí, Costa Rica
  • Average wind speed in December: 16.4km/h

The windiest month (with the highest average wind speed) is February (21.4km/h).
The calmest month (with the lowest average wind speed) is September (6.8km/h).

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Average humidity in December
Hacienda Orosí, Costa Rica

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

The month with the highest relative humidity is October (87%).
The month with the lowest relative humidity is April (62%).

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Average rainfall in December
Hacienda Orosí, Costa Rica

Average rainfall in December - Hacienda Orosí, Costa Rica
  • Average rainfall in December: 9mm

The wettest month (with the highest rainfall) is October (274mm).
The driest month (with the least rainfall) is March (1mm).

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Average rainfall days in December
Hacienda Orosí, Costa Rica

Average rainfall days in December - Hacienda Orosí, Costa Rica
  • Average rainfall days in December: 5.7 days

The month with the highest number of rainy days is September (27.7 days).
The month with the least rainy days is February (2 days).

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Average daylight in December /
Average sunshine in December
Hacienda Orosí, Costa Rica

Average daylight in December / Average sunshine in December - Hacienda Orosí, Costa Rica
  • Average daylight in December: 11.5h

The month with the longest days is June (Average daylight: 12.8h).
The month with the shortest days is December (Average daylight: 11.5h).

  • Average sunshine in December: 9.6h

The month with the most sunshine is July (Average sunshine: 10.2h).
Months with the least sunshine are January and October (Average sunshine: 7.6).

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Average sunshine days in December
Hacienda Orosí, Costa Rica

Average sunshine days in December - Hacienda Orosí, Costa Rica
  • Average sunshine days in December: 24.3 days

The month with the most sunshine days is March (28.8 days).
The month with the least sunshine days is September (1.1 days).

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Average UV index in December
Hacienda Orosí, Costa Rica

Average UV index in December - Hacienda Orosí, 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 and December (UV index 7).
The month with the lowest UV index is November (UV index 6).

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Average cloud cover in December
Hacienda Orosí, Costa Rica

Average cloud cover in December - Hacienda Orosí, Costa Rica
  • Average cloud cover in December: 18

The month with the most cloud cover is October (Cloud cover 46).
The month with the least cloud cover is February (Cloud cover 10).

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Average visibility in December
Hacienda Orosí, Costa Rica

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

Months with the highest visibility are January, February, March, April, May and December (10km).
Months with the lowest visibility are September and October (8km).

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