January weather forecast
Saint-Denis, Reunion

January is a month of mixed weather in Saint-Denis, Reunion. It usually experiences the hottest day and night temperatures, peaking at 30.1°C (86.2°F) and not falling below 23.5°C (74.3°F). An abundance of rainfall, reaching up to 279mm (10.98"), characterizes this month, providing the verdant landscape with vital humidity. It is also during this time that residents and visitors should take precautions against UV exposure, as the UV index soars, reaching its highest point of the year. Altogether, the weather sets a lively stage for both indoor and outdoor activities adjusted to the rainy circumstances.

Temperature

Saint-Denis's warmest season falls during January and February, averaging a high-temperature of 30.1°C (86.2°F).

Rainfall

In Saint-Denis, Reunion, in January, it is raining for 13.3 days, with typically 279mm (10.98") of accumulated precipitation. Throughout the year, there are 119.3 rainfall days, and 1659mm (65.31") of precipitation is accumulated.

Sea temperature

In January, the average sea temperature is 27.8°C (82°F).
Note: Between the temperatures of 25°C (77°F) and 29°C (84.2°F), water is considered very warm, providing pleasure in water activities without discomfort over lengthy periods.

Daylight

In Saint-Denis, the average length of the day in January is 13h and 14min.
On the first day of January, sunrise is at 05:40 and sunset at 19:02. On the last day of the month, sunrise is at 06:00 and sunset at 19:02 +04.

Sunshine

The months with the least sunshine are January and October, with an average of 6.8h of 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 of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: During January, 12 as the daily maximum UV index converts into the following advice:
Utilize every vital safety procedure. Individuals with light skin may endure burns in less than 5 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Even on a cloudy day, sunscreen with a minimum SPF of 30 should be used liberally and reapplied often, especially after a swim or outdoor activity. Take heed! Reflections of sand and water make the Sun's UV rays stronger.