December weather forecast
Fortuné, French Guiana

December

Weather in December

December, the first month of the winter in Fortuné, is also a moderately hot month, with an average temperature ranging between min 24.5°C (76.1°F) and max 28.8°C (83.8°F).

Temperature

The advent of December reveals an average high-temperature of a moderately hot 28.8°C (83.8°F), showing minimal difference from the prior month. Fortuné's nocturnal readings in December exhibit minimal variation from the daytime temperatures, averaging at 24.5°C (76.1°F).

Heat index

December's heat index is calculated to be a fiery hot 35°C (95°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Fortuné, during December, the rain falls for 25.2 days and regularly aggregates up to 204mm (8.03") of precipitation. In Fortuné, during the entire year, the rain falls for 277 days and collects up to 1707mm (67.2") of precipitation.

Daylight

With an average of 11h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:22 and sunset at 18:14. On the last day of December, sunrise is at 06:36 and sunset at 18:28 -03.

Sunshine

In Fortuné, French Guiana, the average sunshine in December is 7.3h.

UV index

The months with the lowest UV index are January through May and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a daily UV index of 6 turns into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Boost your sun resistance with garments that are densely woven yet spacious.

Frequently asked questions

How hot is December in Fortuné?
The high-temperature, in December, in Fortuné, is 28.8°C (83.8°F), while the low-temperature averages to 24.5°C (76.1°F). In December, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 35°C (95°F).
What is the average humidity in December in Fortuné?
In December, the average relative humidity in Fortuné is 83%.
How many days does it rain in December in Fortuné?
In December, the rain falls for 25.2 days. Throughout December, 204mm (8.03") of precipitation is accumulated.
What is the month with the shortest days in Fortuné?
With an average of 11h and 54min of daylight, December has the shortest days of the year in Fortuné.
What is the average length of the day in December in Fortuné?
In Fortuné, the average day length in December is 11h and 52min.
When is the sunrise / sunset in December in Fortuné?
In December, on the first day of the month, sunrise is at 06:22 and sunset at 18:14. On the last day of the month, in Fortuné, French Guiana, sunrise is at 06:36 and sunset at 18:28 -03.
How many hours of sunshine does Fortuné have in December?
The average sunshine duration in December is 7.3h.
What are the months with the lowest UV index in Fortuné?
January through May and December, with an average maximum UV index of 6, are months with the lowest UV index in Fortuné, French Guiana.
What is the UV index intensity in December in Fortuné?
The average daily maximum UV index in December in Fortuné is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December - Fortuné, French Guiana
Average temperature in December
Fortuné, 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 - Fortuné, French Guiana
Average pressure in December
Fortuné, 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 - Fortuné, French Guiana
Average wind speed in December
Fortuné, 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 - Fortuné, French Guiana
Average humidity in December
Fortuné, 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 - Fortuné, French Guiana
Average rainfall in December
Fortuné, 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 - Fortuné, French Guiana
Average rainfall days in December
Fortuné, 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 - Fortuné, French Guiana
Average daylight in December /
Average sunshine in December
Fortuné, 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 - Fortuné, French Guiana
Average sunshine days in December
Fortuné, 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 - Fortuné, French Guiana
Average UV index in December
Fortuné, 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 - Fortuné, French Guiana
Average cloud cover in December
Fortuné, 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 - Fortuné, French Guiana
Average visibility in December
Fortuné, 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).

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