December weather forecast
Port Louis, Mauritius

The city of Port Louis in Mauritius
The city of Port Louis in Mauritius

Weather in December

December, the first month of the summer, in Port Louis, is also a moderately hot month, with average temperature varying between 27.6°C (81.7°F) and 25.2°C (77.4°F).

Temperature

In December, the average high-temperature is essentially the same as in November - a still warm 27.6°C (81.7°F). In December, in Port Louis, the average low-temperature is 25.2°C (77.4°F).

Heat index

In December, the average heat index is estimated at a tropical 30.5°C (86.9°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like metabolic differences, clothing, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In December, the average relative humidity is 75%.

Rainfall

In December, in Port Louis, the rain falls for 13.5 days. Throughout December, 50mm (1.97") of precipitation is accumulated. In Port Louis, Mauritius, during the entire year, the rain falls for 177.1 days and collects up to 480mm (18.9") of precipitation.

Sea temperature

In December, the average sea temperature is 26.8°C (80.2°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

December has the longest days of the year in Port Louis, with an average of 13.3h of daylight.

Sunshine

In December, the average sunshine in Port Louis is 10.3h.

UV index

January through April and December, with an average maximum UV index of 7, are months with the highest UV index in Port Louis. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in December in Port Louis?

The average high-temperature, in December, in Port Louis, Mauritius, is 27.6°C (81.7°F), while the average low-temperature is 25.2°C (77.4°F). The average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, in December is estimated at 30.5°C (86.9°F).

What is the average humidity in December in Port Louis?

In December, the average relative humidity in Port Louis, Mauritius, is 75%.

How much does it rain in Port Louis in December?

In Port Louis, Mauritius, in December, it is raining for 13.5 days, with typically 50mm (1.97") of accumulated precipitation.

What is the water temperature in December in Port Louis?

In December, the average sea temperature in Port Louis is 26.8°C (80.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

When are the longest days in Port Louis?

With an average of 13.3h of daylight, December has the longest days of the year in Port Louis, Mauritius.

What is the average length of the day in December in Port Louis?

The average length of the day in December in Port Louis is 13.3h.

How long on average sun shines in December in Port Louis?

In Port Louis, the average sunshine in December is 10.3h.

When is the highest UV index in Port Louis?

January through April and December, with an average maximum UV index of 7, are months with the highest UV index in Port Louis, Mauritius.

How high is the UV index in December in Port Louis?

The average daily maximum UV index in December in Port Louis, Mauritius, is 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in December
Port Louis, Mauritius

Average temperature in December - Port Louis, Mauritius
  • Average high temperature in December: 27.6°C

The warmest month (with the highest average high temperature) is February (28.6°C).
The month with the lowest average high temperature is August (23.5°C).

  • Average low temperature in December: 25.2°C

The month with the highest average low temperature is February (26°C).
The coldest month (with the lowest average low temperature) is August (21.3°C).

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Average pressure in December
Port Louis, Mauritius

Average pressure in December - Port Louis, Mauritius
  • Average pressure in December: 1013.3mbar

The month with the highest atmospheric pressure is August (1021mbar).
The month with the lowest atmospheric pressure is February (1011.1mbar).

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Average wind speed in December
Port Louis, Mauritius

Average wind speed in December - Port Louis, Mauritius
  • Average wind speed in December: 17.5km/h

The windiest month (with the highest average wind speed) is August (23.6km/h).
The calmest month (with the lowest average wind speed) is November (17.1km/h).

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Average humidity in December
Port Louis, Mauritius

Average humidity in December - Port Louis, Mauritius
  • Average humidity in December: 75%

Months with the highest relative humidity are January, February and March (78%).
Months with the lowest relative humidity are August and September (73%).

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Average rainfall in December
Port Louis, Mauritius

Average rainfall in December - Port Louis, Mauritius
  • Average rainfall in December: 50mm

The wettest month (with the highest rainfall) is January (97mm).
The driest month (with the least rainfall) is September (8mm).

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Average rainfall days in December
Port Louis, Mauritius

Average rainfall days in December - Port Louis, Mauritius
  • Average rainfall days in December: 13.5 days

The month with the highest number of rainy days is March (20.8 days).
Months with the least rainy days are October and November (9.5 days).

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Average sea temperature in December
Port Louis, Mauritius

Average sea temperature in December - Port Louis, Mauritius
  • Average sea temperature in December: 26.8°C

The best month for swimming (with the highest average sea temperature) is March (28.5°C).
The coldest months (with the lowest average sea temperature) are August and September (23.7°C).

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Average daylight in December /
Average sunshine in December
Port Louis, Mauritius

Average daylight in December / Average sunshine in December - Port Louis, Mauritius
  • Average daylight in December: 13.3h

The month with the longest days is December (Average daylight: 13.3h).
The month with the shortest days is June (Average daylight: 10.9h).

  • Average sunshine in December: 10.3h

The month with the most sunshine is October (Average sunshine: 10.4h).
The month with the least sunshine is July (Average sunshine: 6.3h).

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Average sunshine days in December
Port Louis, Mauritius

Average sunshine days in December - Port Louis, Mauritius
  • Average sunshine days in December: 13.1 days

The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is February (5.2 days).

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Average UV index in December
Port Louis, Mauritius

Average UV index in December - Port Louis, Mauritius
  • Average UV index in December: 7

Months with the highest UV index are January, February, March, April and December (UV index 7).
Months with the lowest UV index are May, June, July, August, September, October and November (UV index 6).

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Average cloud cover in December
Port Louis, Mauritius

Average cloud cover in December - Port Louis, Mauritius
  • Average cloud cover in December: 39

Months with the most cloud cover are January and March (Cloud cover 44).
The month with the least cloud cover is May (Cloud cover 35).

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Average visibility in December
Port Louis, Mauritius

Average visibility in December - Port Louis, Mauritius
  • Average visibility in December: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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