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 shift into December in Ribeira Afonso records an average high-temperature of a still moderately hot 27.5°C (81.5°F), subtly varied from November's 27.1°C (80.8°F). An average temperature of 26.6°C (79.9°F) is logged during the nights of December, a small step down from daytime highs.Heat index
December's average heat index is evaluated at a hot 31°C (87.8°F). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. 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 particular importance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in December is 79%.Rainfall
In Ribeira Afonso, in December, during 28.6 rainfall days, 159mm (6.26") of precipitation is typically accumulated. In Ribeira Afonso, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.Daylight
The average length of the day in December is 12h and 7min.On the first day of December, sunrise is at 05:19 and sunset at 17:25. On the last day of the month, sunrise is at 05:33 and sunset at 17:39 GMT.
Sunshine
The average sunshine in December is 8.2h.UV index
The months with the highest UV index are January through May, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 7 during December leads to these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. 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. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the average humidity in December?
How many days does it rain in December?
How many hours of daylight does Ribeira Afonso have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the highest UV index in Ribeira Afonso?
What is the UV index reading in December?
Average temperature in December
Ribeira Afonso, São Tomé and Príncipe
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).
- Average low temperature in December: 26.6°C
The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).
Average pressure in December
Ribeira Afonso, São Tomé and Príncipe
- Average pressure in December: 1010.6mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).
Average wind speed in December
Ribeira Afonso, São Tomé and Príncipe
- Average wind speed in December: 10.8km/h
The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).
Average humidity in December
Ribeira Afonso, São Tomé and Príncipe
- Average humidity in December: 79%
The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).
Average rainfall in December
Ribeira Afonso, São Tomé and Príncipe
- Average rainfall in December: 159mm
The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).
Average rainfall days in December
Ribeira Afonso, São Tomé and Príncipe
- Average rainfall days in December: 28.6 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).
Average daylight in December /
Average sunshine in December
Ribeira Afonso, São Tomé and Príncipe
- Average daylight in December: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 6min).
The months with the shortest days are February and October (Average daylight: 12h and 6min).
- Average sunshine in December: 8h and 1min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).
Average sunshine days in December
Ribeira Afonso, São Tomé and Príncipe
- Average sunshine days in December: 1.5 days
The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).
Average UV index in December
Ribeira Afonso, São Tomé and Príncipe
- Average UV index in December: 7
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in December
Ribeira Afonso, São Tomé and Príncipe
- Average cloud cover in December: 41
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).
Average visibility in December
Ribeira Afonso, São Tomé and Príncipe
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
