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 average high-temperature slightly decreases in December, shifting from a hot 34°C (93.2°F) in November to a still tropical 30.8°C (87.4°F). During the December nights, an average temperature of 20.9°C (69.6°F) is observed.Heat index
In December, the heat index is calculated to be an extremely hot 42°C (107.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.For clarity, heat index numbers account for light winds and areas under shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
The average relative humidity in December is 85%.Rainfall
In Dégrad Reinald, in December, it is raining for 26.2 days, with typically 112mm (4.41") of accumulated precipitation. In Dégrad Reinald, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.Daylight
December has the shortest days of the year, with an average of 12h and 0min of daylight.On the first day of the month, sunrise is at 06:23 and sunset at 18:21. On the last day of December, sunrise is at 06:37 and sunset at 18:35 -03.
Sunshine
In December, the average sunshine is 5.6h.UV index
January, March and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 5 in December translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. To protect against the Sun's most potent rays, avoid direct exposure around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during December?
What is the average humidity in December in Dégrad Reinald?
How much does it rain in Dégrad Reinald in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Dégrad Reinald, French Guiana
- Average high temperature in December: 30.8°C
The warmest month (with the highest average high temperature) is October (34.9°C).
The month with the lowest average high temperature is February (29.3°C).
- Average low temperature in December: 20.9°C
The month with the highest average low temperature is May (21.9°C).
The coldest months (with the lowest average low temperature) are August and September (20.5°C).
Average pressure in December
Dégrad Reinald, French Guiana
- Average pressure in December: 1010.7mbar
The months with the highest atmospheric pressure are June and July (1013mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in December
Dégrad Reinald, French Guiana
- Average wind speed in December: 5.1km/h
The windiest months (with the highest average wind speed) are February, March and November (5.3km/h).
The calmest month (with the lowest average wind speed) is July (4.2km/h).
Average humidity in December
Dégrad Reinald, French Guiana
- Average humidity in December: 85%
The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Dégrad Reinald, French Guiana
- Average rainfall in December: 112mm
The wettest month (with the highest rainfall) is May (192mm).
The driest month (with the least rainfall) is October (21mm).
Average rainfall days in December
Dégrad Reinald, French Guiana
- Average rainfall days in December: 26.2 days
The months with the highest number of rainy days are January and March (26.8 days).
The month with the least rainy days is October (10.4 days).
Average daylight in December /
Average sunshine in December
Dégrad Reinald, French Guiana
- Average daylight in December: 12h and 0min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 12h and 0min).
- Average sunshine in December: 5h and 4min
The months with the most sunshine are September and October (Average sunshine: 8h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Dégrad Reinald, French Guiana
- Average sunshine days in December: 3.7 days
The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is February (1.8 days).
Average UV index in December
Dégrad Reinald, French Guiana
- Average UV index in December: 5
The months with the highest UV index are August, September, October and November (UV index 7).
The months with the lowest UV index are January, March and December (UV index 5).
Average cloud cover in December
Dégrad Reinald, French Guiana
- Average cloud cover in December: 72
The month with the most cloud cover is February (Cloud cover 81).
The month with the least cloud cover is October (Cloud cover 44).
Average visibility in December
Dégrad Reinald, French Guiana
- Average visibility in December: 6km
The month with the highest visibility is October (8km).
The month with the lowest visibility is May (5km).
