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Florianópolis Weather in September
September in Florianópolis sees daytime temperatures around 22°C (72°F) and lows of 16°C (61°F) at night. With around 147 mm (5.8 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Florianópolis in September
Typically, about 19 days will experience rainfall, with an average of 147 mm (5.8 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Florianópolis in September
September in Florianópolis brings typical temperatures with highs around 22°C (72°F) and lows of 16°C (61°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 16°C (61°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Florianópolis in September
The area experiences a moderate amount of sunshine, with approximately 130 hours of sunlight expected. This means a decent mix of sun and overcast.For Florianópolis itself, April, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Florianópolis Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
22°C (72°F)
Chance of Rain
63%
Precipitation
147 mm (5.8 in)
Rainy days
19 days
Humidity
80%
Sunshine
130 hours
Percentage Sunshine
Florianópolis Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Florianópolis - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Florianópolis typically stay consistent throughout September, with daily highs averaging around 22°C (72°F). Nights are pleasant, with lows typically ranging from 14°C (57°F) to 17°C (63°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Florianópolis in September
Browse day-by-day weather records for Florianópolis spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Florianópolis historical weather extremes in September
Based on weather observations in Florianópolis between 1976 and 2026, these are the recorded extremes during September.
- Florianópolis recorded its highest September temperature of 33°C (91°F) on September 20, 1994.
- Florianópolis experienced its chilliest September day on September 12, 2005, reaching only 12°C (54°F).
- Florianópolis registered its coldest September night on September 5, 2006, with temperatures dropping to 4°C (39°F).
Best Places in Brazil in September
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Florianópolis in September
For Florianópolis in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Florianópolis in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Florianópolis 3-Day Forecast
More climate data for Florianópolis
Temperature Rainfall Sunshine Humidity
See the full Florianópolis climate overview or explore weather in Brazil.
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