December weather forecastCascades, Reunion
December
Weather in December
Closing out the year, December experiences a major increase in rainfall. The tropical climate is maintained with consistent warm temperatures and high humidity. As wind conditions mellow from previous months, climatic patterns remain steady. This period is characterized by increased cloud cover, mitigating the impact of the UV index. Notably, pressure is at its lowest for the year, registering at 1013.3mb.Temperature
The shift to December in Cascades signals an average high-temperature of a still warm 25.1°C (77.2°F), subtly varied from November's 23.6°C (74.5°F). Cascades sustains an average of approximately a pleasant 22.7°C (72.9°F) during December nights, with little variation from daytime highs.Humidity
In Cascades, Reunion, the average relative humidity in December is 81%.Rainfall
In Cascades, in December, during 26.7 rainfall days, 99mm (3.9") of precipitation is typically accumulated. Throughout the year, in Cascades, Reunion, there are 280.3 rainfall days, and 1115mm (43.9") of precipitation is accumulated.Daylight
With an average of 13h and 24min of daylight, December has the longest days of the year in Cascades.On the first day of December in Cascades, sunrise is at 05:26 and sunset at 18:45. On the last day of the month, sunrise is at 05:37 and sunset at 19:01 +04.
Sunshine
In December, the average sunshine is 10h.UV index
January through May, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 6 in December suggests the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cascades, Reunion
- Average high temperature in December: 25.1°C
The warmest month (with the highest average high temperature) is January (25.7°C).
The month with the lowest average high temperature is August (20.4°C).
- Average low temperature in December: 22.7°C
The month with the highest average low temperature is February (23.6°C).
The coldest month (with the lowest average low temperature) is August (18.2°C).
Average pressure in December
Cascades, Reunion
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is August (1021.3mbar).
The month with the lowest atmospheric pressure is February (1011mbar).
Average wind speed in December
Cascades, Reunion
- Average wind speed in December: 12.4km/h
The windiest month (with the highest average wind speed) is July (18km/h).
The calmest months (with the lowest average wind speed) are November and December (12.4km/h).
Average humidity in December
Cascades, Reunion
- Average humidity in December: 81%
The months with the highest relative humidity are February and March (84%).
The months with the lowest relative humidity are August and September (79%).
Average rainfall in December
Cascades, Reunion
- Average rainfall in December: 99mm
The wettest month (with the highest rainfall) is January (199mm).
The driest month (with the least rainfall) is September (26mm).
Average rainfall days in December
Cascades, Reunion
- Average rainfall days in December: 26.7 days
The month with the highest number of rainy days is March (27.7 days).
The month with the least rainy days is September (18.5 days).
Average daylight in December /
Average sunshine in December
Cascades, Reunion
- Average daylight in December: 13h and 24min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).
- Average sunshine in December: 10h and 0min
The month with the most sunshine is October (Average sunshine: 10h and 12min).
The month with the least sunshine is June (Average sunshine: 6h and 18min).
Average sunshine days in December
Cascades, Reunion
- Average sunshine days in December: 1.2 days
The month with the most sunshine days is October (5.5 days).
The month with the least sunshine days is February (0.3 days).
Average UV index in December
Cascades, Reunion
- Average UV index in December: 6
The months with the highest UV index are January, February, March, April, May, November and December (UV index 6).
The months with the lowest UV index are June, July, August, September and October (UV index 5).
Average cloud cover in December
Cascades, Reunion
- Average cloud cover in December: 42
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in December
Cascades, Reunion
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
