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 onset of December marks an average high-temperature of a still hot 30.9°C (87.6°F), hardly differing from November's 33.8°C (92.8°F). During December, the nighttime temperature averages to an agreeable 21.1°C (70°F).Heat index
For most parts of December, the heat index is calculated to be an extremely hot 43°C (109.4°F). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.Metrics for the heat index primarily focus on shaded spots and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful 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's vital to remain hydrated, particularly during prolonged physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
The average relative humidity in December is 86%.Rainfall
In Citron, during December, the rain falls for 28.1 days and regularly aggregates up to 106mm (4.17") of precipitation. In Citron, during the entire year, the rain falls for 259.6 days and collects up to 915mm (36.02") of precipitation.Daylight
With an average of 11h and 54min of daylight, December has the shortest days of the year in Citron.On the first day of December, sunrise is at 06:29 and sunset at 18:21. On the last day of the month, sunrise is at 06:43 and sunset at 18:34 -03.
Sunshine
In December, the average sunshine is 5.9h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 5 during December, leads to the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in December?
What is the average humidity in December?
How many days does it rain in December?
What is the month with the shortest days?
How many hours of daylight does Citron have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Citron, French Guiana
- Average high temperature in December: 30.9°C
The warmest month (with the highest average high temperature) is October (34.8°C).
The month with the lowest average high temperature is February (29.5°C).
- Average low temperature in December: 21.1°C
The month with the highest average low temperature is May (22°C).
The coldest month (with the lowest average low temperature) is January (20.7°C).
Average pressure in December
Citron, French Guiana
- Average pressure in December: 1010.7mbar
The months with the highest atmospheric pressure are June and July (1012.9mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in December
Citron, French Guiana
- Average wind speed in December: 5.3km/h
The windiest month (with the highest average wind speed) is March (5.5km/h).
The calmest month (with the lowest average wind speed) is July (4.4km/h).
Average humidity in December
Citron, French Guiana
- Average humidity in December: 86%
The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Citron, French Guiana
- Average rainfall in December: 106mm
The wettest month (with the highest rainfall) is May (171mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in December
Citron, French Guiana
- Average rainfall days in December: 28.1 days
The month with the highest number of rainy days is December (28.1 days).
The month with the least rainy days is September (10.3 days).
Average daylight in December /
Average sunshine in December
Citron, French Guiana
- Average daylight in December: 11h and 5min
The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is September (Average sunshine: 9h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Citron, French Guiana
- Average sunshine days in December: 2 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is February (1.4 days).
Average UV index in December
Citron, French Guiana
- Average UV index in December: 5
The months with the highest UV index are July, August, September, October and November (UV index 7).
The month with the lowest UV index is December (UV index 5).
Average cloud cover in December
Citron, French Guiana
- Average cloud cover in December: 71
The month with the most cloud cover is February (Cloud cover 78).
The month with the least cloud cover is October (Cloud cover 45).
Average visibility in December
Citron, French Guiana
- Average visibility in December: 6km
The months with the highest visibility are August, September, October and November (7km).
The month with the lowest visibility is May (5km).
