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
In December, the average high-temperature registers at a warm 28.8°C (83.8°F), nearly identical to November's 30.8°C (87.4°F). December records a small disparity from daytime temperatures, marking an average low-temperature of 24.5°C (76.1°F).Heat index
December's heat index is appraised at a sweltering 35°C (95°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.Consider that heat index readings are for situations in the shade and light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
The average relative humidity in December in Nationale, French Guiana, is 83%.Rainfall
In December, in Nationale, the rain falls for 25.2 days. Throughout December, 204mm (8.03") of precipitation is accumulated. Throughout the year, in Nationale, there are 277 rainfall days, and 1707mm (67.2") of precipitation is accumulated.Daylight
December has the shortest days of the year in Nationale, French Guiana, with an average of 11h and 54min of daylight.On the first day of the month, sunrise is at 06:23 and sunset at 18:16. On the last day of December, sunrise is at 06:38 and sunset at 18:30 -03.
Sunshine
The average sunshine in December is 7.3h.UV index
January through May and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 6 during December leads to these advisories:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is December in Nationale?
What is the average humidity in December in Nationale?
How much does it rain in Nationale in December?
What is the month with the shortest days in Nationale?
What is the average length of the day in December in Nationale?
When are sunrise and sunset in December in Nationale?
How long on average sun shines in December in Nationale?
What is the month with the lowest UV index in Nationale?
What is the UV index reading in December in Nationale?
Average temperature in December
Nationale, French Guiana
- Average high temperature in December: 28.8°C
The warmest month (with the highest average high temperature) is October (31.6°C).
The month with the lowest average high temperature is February (27.7°C).
- Average low temperature in December: 24.5°C
The months with the highest average low temperature are October and November (24.8°C).
The coldest months (with the lowest average low temperature) are June and July (23.8°C).
Average pressure in December
Nationale, French Guiana
- Average pressure in December: 1010.8mbar
The month with the highest atmospheric pressure is July (1013.2mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed in December
Nationale, French Guiana
- Average wind speed in December: 11.7km/h
The windiest month (with the highest average wind speed) is February (12.9km/h).
The calmest month (with the lowest average wind speed) is July (8.3km/h).
Average humidity in December
Nationale, French Guiana
- Average humidity in December: 83%
The month with the highest relative humidity is May (86%).
The months with the lowest relative humidity are September and October (76%).
Average rainfall in December
Nationale, French Guiana
- Average rainfall in December: 204mm
The wettest month (with the highest rainfall) is May (293mm).
The driest month (with the least rainfall) is September (23mm).
Average rainfall days in December
Nationale, French Guiana
- Average rainfall days in December: 25.2 days
The month with the highest number of rainy days is May (28.9 days).
The month with the least rainy days is October (11.6 days).
Average daylight in December /
Average sunshine in December
Nationale, 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: 7h and 2min
The month with the most sunshine is September (Average sunshine: 9h and 12min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in December
Nationale, French Guiana
- Average sunshine days in December: 4.1 days
The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is June (0.9 days).
Average UV index in December
Nationale, French Guiana
- Average UV index in December: 6
The months with the highest UV index are June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May and December (UV index 6).
Average cloud cover in December
Nationale, French Guiana
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in December
Nationale, French Guiana
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, August, September, October and November (10km).
The months with the lowest visibility are April, May, June, July and December (9km).
