December weather forecast
Monte Rosa, São Tomé and Príncipe

Weather in December

The first month of the winter, December, is still a warm month in Monte Rosa, São Tomé and Príncipe, with an average temperature ranging between min 26.6°C (79.9°F) and max 27.5°C (81.5°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a still moderately hot 27.5°C (81.5°F). The average low-temperature, in Monte Rosa, is 26.6°C (79.9°F).

Heat index

In December, the average heat index is calculated to be a tropical 31°C (87.8°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, metabolic differences, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In December, the rain falls for 28.6 days. Throughout December, 159mm (6.26") of precipitation is accumulated. Throughout the year, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.

Daylight

In Monte Rosa, the average length of the day in December is 12h and 7min.
On the first day of December in Monte Rosa, sunrise is at 05:19 and sunset at 17:26. On the last day of the month, sunrise is at 05:33 and sunset at 17:40 GMT.

Sunshine

The average sunshine in December is 8.2h.

UV index

January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index in Monte Rosa, São Tomé and Príncipe. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 in December interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in December in Monte Rosa?

The average high-temperature, in December, is 27.5°C (81.5°F), while the average low-temperature is 26.6°C (79.9°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in December is calculated to be 31°C (87.8°F).

What is the average humidity in December in Monte Rosa?

In December, the average relative humidity in Monte Rosa, São Tomé and Príncipe, is 79%.

How many days does it rain in December in Monte Rosa?

In December, in Monte Rosa, the rain falls for 28.6 days. Throughout December, 159mm (6.26") of precipitation is accumulated.

What is the average length of the day in December in Monte Rosa?

The average day length in December is 12h and 7min.

When is the sunrise / sunset in December in Monte Rosa?

On the first day of December in Monte Rosa, sunrise is at 05:19 and sunset at 17:26. On the last day of the month, sunrise is at 05:33 and sunset at 17:40 GMT.

How many hours of sunshine does Monte Rosa have in December?

The average sunshine duration in December in Monte Rosa, São Tomé and Príncipe, is 8.2h.

What are the months with the highest UV index in Monte Rosa?

The months with the highest UV index in Monte Rosa are January through May, October through December, with an average maximum UV index of 7.

What is the UV index intensity in December in Monte Rosa?

In December, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Average temperature in December
Monte Rosa, São Tomé and Príncipe

Average temperature in December - Monte Rosa, 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).

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Average pressure in December
Monte Rosa, São Tomé and Príncipe

Average pressure in December - Monte Rosa, 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).

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Average wind speed in December
Monte Rosa, São Tomé and Príncipe

Average wind speed in December - Monte Rosa, 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).

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Average humidity in December
Monte Rosa, São Tomé and Príncipe

Average humidity in December - Monte Rosa, 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%).

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Average rainfall in December
Monte Rosa, São Tomé and Príncipe

Average rainfall in December - Monte Rosa, 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).

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Average rainfall days in December
Monte Rosa, São Tomé and Príncipe

Average rainfall days in December - Monte Rosa, 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).

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Average daylight in December /
Average sunshine in December
Monte Rosa, São Tomé and Príncipe

Average daylight in December / Average sunshine in December - Monte Rosa, São Tomé and Príncipe
  • Average daylight in December: 12h and 7min

The month with the longest days is June (Average daylight: 12h and 8min).
The month with the shortest days is October (Average daylight: 12h and 7min).

  • Average sunshine in December: 8h and 12min

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).

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Average sunshine days in December
Monte Rosa, São Tomé and Príncipe

Average sunshine days in December - Monte Rosa, 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).

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Average UV index in December
Monte Rosa, São Tomé and Príncipe

Average UV index in December - Monte Rosa, 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).

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Average cloud cover in December
Monte Rosa, São Tomé and Príncipe

Average cloud cover in December - Monte Rosa, 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).

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Average visibility in December
Monte Rosa, São Tomé and Príncipe

Average visibility in December - Monte Rosa, 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).

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