January weather forecast
Florianópolis, Brazil

January is when Florianópolis, Brazil, greets the New Year with hot and humid weather. Primed for beach tourism, the city experiences high daily average temperatures from 28°C (82.4°F) along with a maximum ultraviolet (UV) index of 12. It is significant to note that January sees plenty of sunshine complemented by high sea temperatures, making outdoor activities especially inviting. Rainfall occurs frequently this month, contributing to the relative humidity. Daylight extends for over half the day, encouraging sightseeing and exploration.

Temperature

January ushers in an average high-temperature of a still warm 28°C (82.4°F), aligning closely with the preceding month. In Florianópolis, January nights witness a steady temperature drop to an agreeable 21.4°C (70.5°F).

Heat index

For most parts of January, the heat index is evaluated at a tropical 32°C (89.6°F). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.
Heat index values are typically calculated for conditions of shade and a light breeze. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.

Humidity

In January, the average relative humidity is 81%.

Rainfall

In January, the rain falls for 12 days. Throughout January, 163mm (6.42") of precipitation is accumulated. In Florianópolis, during the entire year, the rain falls for 120 days and collects up to 1518mm (59.76") of precipitation.

Sea temperature

The months with the warmest seawater are January and February, with an average sea temperature of 25.8°C (78.4°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In January, the average length of the day in Florianópolis is 13h and 39min.
On the first day of the month, sunrise is at 05:21 and sunset at 19:13. On the last day of January, sunrise is at 05:45 and sunset at 19:09 -03.

Sunshine

In Florianópolis, the average sunshine in January is 6.5h.

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 of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In January, the maximum UV index of 12 transforms into these recommendations:
Utilize all vital precautions. Guarding against sun harm is non-negotiable. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Apply and frequently reapply a broad-spectrum SPF 30+ sunscreen after every two hours, or immediately after a swim or outdoor exercise. Watch out! Sand and water enhance the UV exposure you receive.