December weather forecastSimon, French Guiana
December
Weather in December
December, the first month of the winter in Simon, is also a moderately hot month, with temperature in the range of an average high of 28.8°C (83.8°F) and an average low of 24.5°C (76.1°F).Temperature
As December takes hold, the average high-temperature is a warm 28.8°C (83.8°F), nearly mirroring that of the previous month. An average low-temperature of 24.5°C (76.1°F), slightly less than the daytime peak, marks the month of December.Heat index
During December, the heat index is computed to be a fiery hot 35°C (95°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In Simon, the average relative humidity in December is 83%.Rainfall
In December, in Simon, the rain falls for 25.2 days. Throughout December, 204mm (8.03") of precipitation is accumulated. In Simon, 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 06:23 and sunset at 18:16. On the last day of December, sunrise is at 06:37 and sunset at 18:29 -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 in Simon. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 during December translates into the following recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Simon, 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
Simon, 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
Simon, 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
Simon, 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
Simon, 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
Simon, 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
Simon, French Guiana
- Average daylight in December: 11h and 54min
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 18min
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
Simon, 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
Simon, 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
Simon, 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
Simon, 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).
