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
With December's advent, Roche Hirondelle, French Guiana, sees an average high-temperature of a warm 28.6°C (83.5°F), subtly shifted from November's 30.4°C (86.7°F). December in Roche Hirondelle sees a slight dip to an average low temperature of 24.7°C (76.5°F) from the daytime highs.Heat index
For most parts of December, the heat index is appraised at a tropical 34°C (93.2°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The average relative humidity in December is 82%.Rainfall
In Roche Hirondelle, in December, it is raining for 26 days, with typically 227mm (8.94") of accumulated precipitation. In Roche Hirondelle, during the entire year, the rain falls for 288 days and collects up to 1773mm (69.8") of precipitation.Daylight
With an average of 11h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 06:27 and sunset at 18:17. On the last day of December, sunrise is at 06:42 and sunset at 18:31 -03.
Sunshine
The average sunshine in December is 7.4h.UV index
January through June and December, with an average maximum UV index of 6, are months with the lowest UV index in Roche Hirondelle. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 6 in December leads to these recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Roche Hirondelle in December?
What is the average humidity in December in Roche Hirondelle?
How many days does it rain in December in Roche Hirondelle?
What is the month with the shortest days in Roche Hirondelle?
What is the average length of the day in December in Roche Hirondelle?
When is the sunrise / sunset in December in Roche Hirondelle?
How many hours of sunshine does Roche Hirondelle have in December?
What is the month with the lowest UV index in Roche Hirondelle?
How high is the UV index in December in Roche Hirondelle?
Average temperature in December
Roche Hirondelle, French Guiana
- Average high temperature in December: 28.6°C
The warmest months (with the highest average high temperature) are September and October (30.9°C).
The month with the lowest average high temperature is February (27.5°C).
- Average low temperature in December: 24.7°C
The month with the highest average low temperature is November (25.1°C).
The coldest month (with the lowest average low temperature) is January (24.2°C).
Average pressure in December
Roche Hirondelle, French Guiana
- Average pressure in December: 1010.9mbar
The months with the highest atmospheric pressure are June and July (1013.1mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in December
Roche Hirondelle, French Guiana
- Average wind speed in December: 13.6km/h
The windiest month (with the highest average wind speed) is February (15.3km/h).
The calmest month (with the lowest average wind speed) is July (9.7km/h).
Average humidity in December
Roche Hirondelle, French Guiana
- Average humidity in December: 82%
The months with the highest relative humidity are February and May (84%).
The months with the lowest relative humidity are September and October (77%).
Average rainfall in December
Roche Hirondelle, French Guiana
- Average rainfall in December: 227mm
The wettest month (with the highest rainfall) is May (279mm).
The driest month (with the least rainfall) is September (29mm).
Average rainfall days in December
Roche Hirondelle, French Guiana
- Average rainfall days in December: 26 days
The month with the highest number of rainy days is May (29.6 days).
The months with the least rainy days are September and October (14.3 days).
Average daylight in December /
Average sunshine in December
Roche Hirondelle, 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 48min).
- Average sunshine in December: 7h and 2min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in December
Roche Hirondelle, French Guiana
- Average sunshine days in December: 3.2 days
The month with the most sunshine days is October (13.2 days).
The month with the least sunshine days is May (0.6 days).
Average UV index in December
Roche Hirondelle, French Guiana
- Average UV index in December: 6
The months with the highest UV index are July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June and December (UV index 6).
Average cloud cover in December
Roche Hirondelle, French Guiana
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in December
Roche Hirondelle, French Guiana
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are May, June and July (9km).
