December weather forecastReunion

Weather in December

December in Reunion sees the full swing of the austral summer, with high temperatures and substantial rainfall. Coastal regions typically experience temperatures from 24°C (75.2°F) to 29°C (84.2°F), while the highlands see temperatures between 17°C (62.6°F) to 22°C (71.6°F).

Cities such as Saint-Denis and Saint-Pierre follow these temperature patterns. The high humidity levels prevalent during this month intensify the sensation of heat, making the conditions feel even warmer, especially in the urban areas.

December also marks the beginning of the cyclone season. The eastern coast and the mountainous regions experience heavy rainfall, with precipitation levels ranging from 200mm (7.87") to 350mm (13.78"). The western coast, under the rain shadow effect, receives less rainfall, though it is higher than in the cooler months.

When compared to November, December's temperatures remain relatively consistent, but rainfall increases due to the onset of the cyclone season. As the island transitions into January, these hot, wet conditions continue, along with the risk of extreme weather events from potential cyclones.

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• Saint-Denis - December »
  The months with the highest UV index in Saint-Denis are January through March, November and December, with an average maximum UV index of 12. December has the longest days of the year in Saint-Denis, with an average of 13h and 24min of daylight.
• Saint-Paul - December »
  In Saint-Paul, in December, during 22.5 rainfall days, 61mm (2.4") of precipitation is typically accumulated. In Saint-Paul, in December, during 22.5 rainfall days, 61mm (2.4") of precipitation is typically accumulated.
• Saint-Pierre - December »
  With an average of 13h and 24min of daylight, December has the longest days of the year in Saint-Pierre, Reunion. In Saint-Pierre, in December, during 21.2 rainfall days, 66mm (2.6") of precipitation is typically accumulated.
• Saint-Louis - December »
  December marks the arrival of summer in Saint-Louis bringing in the highest temperatures of the year. Saint-Louis registers an average high-temperature of a still warm 25.6°C (78.1°F) with the arrival of December, showing minor deviation from the preceding month.
• Le Port - December »
  The month with the longest days in Le Port is December, with an average of 13h and 24min of daylight. The month with the longest days in Le Port is December, with an average of 13h and 24min of daylight.
• Saint-Joseph - December »
  The month with the longest days in Saint-Joseph, Reunion, is December, with an average of 13h and 24min of daylight. The month with the longest days in Saint-Joseph is December, with an average of 13h and 24min of daylight.
• Saint-Leu - December »
  December has the longest days of the year in Saint-Leu with an average of 13h and 24min of daylight. The months with the highest UV index in Saint-Leu are January through March, November and December, with an average maximum UV index of 12.
• Les Avirons - December »
  In December, Les Avirons concludes the year with a mild jump in sea temperature from 25.3°C (77.5°F) in November to a comfortable 26.7°C (80.1°F). The month with the longest days in Les Avirons, Reunion, is December, with an average of 13h and 24min of daylight.