December weather forecastFlorianópolis, Brazil

Weather in December

December in Florianópolis ushers in the year-end festivities with active weather dynamics. The city experiences 137mm (5.39") of rainfall, relatively evenly distributed across the month. The longer daylight hours and relatively high temperatures make it an exciting month for outdoor activities and celebration. With sea temperatures climbing noticably, the beaches once again become a focal point of city activities.

Temperature

Florianópolis records an average high-temperature of a still warm 26.6°C (79.9°F) in December, closely mirroring the climate of the previous month. Throughout December, Florianópolis anticipates an average low-temperature of 20.3°C (68.5°F).

Humidity

November and December, with an average relative humidity of 80%, are the least humid months in Florianópolis.

Rainfall

In Florianópolis, in December, it is raining for 11 days, with typically 137mm (5.39") of accumulated precipitation. In Florianópolis, during the entire year, the rain falls for 120 days and collects up to 1518mm (59.76") of precipitation.

Sea temperature

In December, the average sea temperature in Florianópolis is 24.1°C (75.4°F).
Note: Considering one's resistance to cold, elements like sunshine, wind, and the prevailing temperature matter when taking a swim in 24.1°C (75.4°F) waters. (For comparison, the Olympic swimming standard is set between 25°C (77°F) and 28°C (82.4°F).)

Daylight

With an average of 13h and 54min of daylight, December has the longest days of the year.
On the first day of December in Florianópolis, sunrise is at 05:10 and sunset at 18:56. On the last day of the month, sunrise is at 05:21 and sunset at 19:13 -03.

Sunshine

In Florianópolis, the average sunshine in December is 6.1h.

UV index

The months with the highest UV index in Florianópolis are January, February, November and December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 12 translates into these guidelines:
Employ every precaution of importance, unprotected skin and eyes could burn within moments. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Despite the clouds, sunscreen with an SPF of at least 30 should be used liberally and reapplied frequently, especially after a swim or outdoor workout. Beware! Reflections from sand and water can intensify the Sun's UV radiation.