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
December
Weather in December
Temperature
The arrival of December sees an average high-temperature of a still moderately hot 25.1°C (77.2°F), hardly diverging from November's 24.5°C (76.1°F). Nighttime temperatures consistently average a moderate 15.7°C (60.3°F) during December.Humidity
The average relative humidity in December is 81%.Rainfall
In Jaris, during December, the rain falls for 20.8 days and regularly aggregates up to 61mm (2.4") of precipitation. Throughout the year, there are 289.2 rainfall days, and 2603mm (102.48") of precipitation is accumulated.Daylight
With an average of 11h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 05:38 and sunset at 17:14. On the last day of December, sunrise is at 05:53 and sunset at 17:27 CST.
Sunshine
In Jaris, the average sunshine in December is 8.3h.UV index
The months with the lowest UV index are January, February, May through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index, 5 during December, leads to the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the average humidity in December?
How much does it rain in December?
What is the month with the shortest days in Jaris?
How many hours of daylight does Jaris have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Jaris have in December?
When is the lowest UV index in Jaris?
How high is the UV index in December?
Average temperature in December
Jaris, Costa Rica
- Average high temperature in December: 25.1°C
The warmest month (with the highest average high temperature) is April (28°C).
The month with the lowest average high temperature is October (23.7°C).
- Average low temperature in December: 15.7°C
The month with the highest average low temperature is May (18.5°C).
The coldest month (with the lowest average low temperature) is January (15.3°C).
Average pressure in December
Jaris, Costa Rica
- Average pressure in December: 1011.6mbar
The month with the highest atmospheric pressure is January (1012.2mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).
Average wind speed in December
Jaris, Costa Rica
- Average wind speed in December: 9.1km/h
The windiest month (with the highest average wind speed) is February (10.9km/h).
The calmest month (with the lowest average wind speed) is September (3.9km/h).
Average humidity in December
Jaris, Costa Rica
- Average humidity in December: 81%
The month with the highest relative humidity is October (90%).
The month with the lowest relative humidity is March (71%).
Average rainfall in December
Jaris, Costa Rica
- Average rainfall in December: 61mm
The wettest month (with the highest rainfall) is October (429mm).
The driest month (with the least rainfall) is February (24mm).
Average rainfall days in December
Jaris, Costa Rica
- Average rainfall days in December: 20.8 days
The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (11.8 days).
Average daylight in December /
Average sunshine in December
Jaris, 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 2min
The month with the most sunshine is February (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 6h and 6min).
Average sunshine days in December
Jaris, Costa Rica
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is February (13.1 days).
The month with the least sunshine days is July (0.3 days).
Average UV index in December
Jaris, Costa Rica
- Average UV index in December: 5
The months with the highest UV index are March and April (UV index 6).
The months with the lowest UV index are January, February, May, June, July, August, September, October, November and December (UV index 5).
Average cloud cover in December
Jaris, Costa Rica
- Average cloud cover in December: 38
The month with the most cloud cover is October (Cloud cover 63).
The month with the least cloud cover is February (Cloud cover 23).
Average visibility in December
Jaris, Costa Rica
- Average visibility in December: 8km
The months with the highest visibility are January, February, March and April (9km).
The months with the lowest visibility are September and October (6km).
