December weather forecast
Saint-Denis, Reunion

The glorious landscape of the Saint-Denis city, on Reunion Island
The glorious landscape of the Saint-Denis city, on Reunion Island

Weather in December

The first month of the summer, December, is still a warm month in Saint-Denis, Reunion, with an average temperature ranging between min 22.4°C (72.3°F) and max 29.1°C (84.4°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a still warm 29.1°C (84.4°F). In Saint-Denis, in December, the average low-temperature is 22.4°C (72.3°F).

Rainfall

In Saint-Denis, during December, the rain falls for 11.1 days and regularly aggregates up to 189mm (7.44") of precipitation. Throughout the year, in Saint-Denis, there are 119.3 rainfall days, and 1659mm (65.31") of precipitation is accumulated.

Sea temperature

In Saint-Denis, the average water 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

The month with the longest days is December, with an average of 13h and 23min of daylight.
On the first day of the month, sunrise is at 05:28 and sunset at 18:46. On the last day of December, in Saint-Denis, Reunion, sunrise is at 05:39 and sunset at 19:02 +04.

Sunshine

April and December, with an average of 7.4h of sunshine, are months with the most sunshine.

UV index

January through March, November and December, with an average maximum UV index of 12, are months with the highest UV index in Saint-Denis. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 12 in December transform into the following instructions:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Saint-Denis?

In December, in Saint-Denis, Reunion, the average high-temperature is 29.1°C (84.4°F), and the average low-temperature is 22.4°C (72.3°F).

How much does it rain in Saint-Denis in December?

In December, in Saint-Denis, Reunion, the rain falls for 11.1 days. Throughout December, 189mm (7.44") of precipitation is accumulated.

What is the sea water temperature in December in Saint-Denis?

In Saint-Denis, the average seawater temperature in December 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 Saint-Denis?

The month with the longest days in Saint-Denis, Reunion, is December, with an average of 13h and 23min of daylight.

What is the average length of the day in December in Saint-Denis?

The average day length in December is 13h and 23min.

When are sunrise and sunset in December in Saint-Denis?

On the first day of December in Saint-Denis, sunrise is at 05:28 and sunset at 18:46. On the last day of the month, sunrise is at 05:39 and sunset at 19:02 +04.

What is the month with the most sunshine in Saint-Denis?

The months with the most sunshine in Saint-Denis, Reunion, are April and December, with an average of 7.4h of sunshine.

How long on average sun shines in December in Saint-Denis?

In Saint-Denis, Reunion, the average sunshine duration in December is 7.4h.

What is the month with the highest UV index in Saint-Denis?

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 12.

What is the UV index intensity in December in Saint-Denis?

In Saint-Denis, Reunion, the average daily maximum UV index in December is 12. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from unprotected exposure to UV radiation.

Average temperature in December
Saint-Denis, Reunion

Average temperature in December - Saint-Denis, Reunion
  • Average high temperature in December: 29.1°C

The warmest months (with the highest average high temperature) are January and February (30.1°C).
The month with the lowest average high temperature is July (25.2°C).

  • Average low temperature in December: 22.4°C

The month with the highest average low temperature is February (23.7°C).
The coldest month (with the lowest average low temperature) is August (18°C).

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Average rainfall in December
Saint-Denis, Reunion

Average rainfall in December - Saint-Denis, Reunion
  • Average rainfall in December: 188.7mm

The wettest month (with the highest rainfall) is February (351mm).
The driest month (with the least rainfall) is October (43.4mm).

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Average rainfall days in December
Saint-Denis, Reunion

Average rainfall days in December - Saint-Denis, Reunion
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is February (14.3 days).
The month with the least rainy days is November (5.9 days).

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Average sea temperature in December
Saint-Denis, Reunion

Average sea temperature in December - Saint-Denis, Reunion
  • 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 (23.8°C).

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Average daylight in December /
Average sunshine in December
Saint-Denis, Reunion

Average daylight in December / Average sunshine in December - Saint-Denis, Reunion
  • Average daylight in December: 13h and 23min

The month with the longest days is December (Average daylight: 13h and 23min).
The month with the shortest days is June (Average daylight: 10h and 53min).

  • Average sunshine in December: 7h and 24min

The months with the most sunshine are April and December (Average sunshine: 7h and 24min).
The months with the least sunshine are January and October (Average sunshine: 6h and 48min).

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Average UV index in December
Saint-Denis, Reunion

Average UV index in December - Saint-Denis, Reunion
  • Average UV index in December: 12

The months with the highest UV index are January, February, March, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 6).

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