Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The advent of December presents an average high-temperature of a still moderately hot 26.5°C (79.7°F), maintaining a close correlation with the preceding month. Throughout December, an average low-temperature of 17.2°C (63°F) is experienced.Humidity
The average relative humidity in December in Atenas is 81%.Rainfall
In Atenas, 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 36min of daylight.On the first day of December in Atenas, 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 Atenas, the average sunshine in December is 8.7h.UV index
The months with the highest UV index in Atenas are January through April, June, July, September, October and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 6 in December translates into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the average December temperature in Atenas?
What is the average humidity in December in Atenas?
How much does it rain in Atenas in December?
What is the month with the shortest days in Atenas?
How many hours of daylight does Atenas have in December?
When is the sunrise / sunset in December in Atenas?
How long on average sun shines in December in Atenas?
What is the month with the highest UV index in Atenas?
What is the UV index intensity in December in Atenas?
Average temperature in December
Atenas, 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
Atenas, 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
Atenas, 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
Atenas, 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
Atenas, 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
Atenas, 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
Atenas, 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: 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
Atenas, 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
Atenas, 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
Atenas, 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
Atenas, 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).
Atenas, Costa Rica
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