Climate averages 1991–2020
Rio do Sul weather
in September.
A warm, wet month: the 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Rio do Sul: daytime highs average 22.1°C and nights cool to about 13.8°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 151 mm of rain on roughly 12 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average September day.
The nearest other city in this atlas is Indaial (54 km away). In September its highs average 22.0°C, about as warm as Rio do Sul, with 168 mm of rain.
Among the 448 cities listed in Brazil, Rio do Sul ranks joint 396th of 448 for the warmest September highs and joint 413th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Rio do Sul is 5.4°C cooler than that mean.
From September to October, average highs rise by 1.7°C to 23.8°C, and monthly rainfall falls from 151 mm to 150 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rio do Sul climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.9°C20.0°C | 20.0°C | 184 | 20.3 | 13.614 h |
| February | 27.8°C20.2°C | 20.2°C | 156 | 18.5 | 13.013 h |
| March | 26.6°C19.2°C | 19.2°C | 105 | 15.1 | 12.312 h |
| April | 24.4°C16.7°C | 16.7°C | 82 | 9.3 | 11.511 h |
| May | 21.0°C13.1°C | 13.1°C | 105 | 9.2 | 10.811 h |
| June | 19.5°C11.4°C | 11.4°C | 111 | 9.7 | 10.510 h |
| July | 19.2°C10.5°C | 10.5°C | 99 | 9.8 | 10.611 h |
| August | 20.9°C11.8°C | 11.8°C | 94 | 9.3 | 11.211 h |
| September, selected | 22.1°C13.8°C | 13.8°C | 151 | 12.4 | 11.912 h |
| October | 23.8°C15.9°C | 15.9°C | 150 | 15.1 | 12.713 h |
| November | 25.3°C17.1°C | 17.1°C | 121 | 14.7 | 13.413 h |
| December | 27.3°C19.0°C | 19.0°C | 148 | 16.4 | 13.814 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Indaial in SeptemberBrazil · 54 kmHigh 22.0°C · Low 14.5°C · 168 mm rain
- Blumenau in SeptemberBrazil · 66 kmHigh 22.2°C · Low 15.0°C · 158 mm rain
- Brusque in SeptemberBrazil · 73 kmHigh 22.3°C · Low 14.9°C · 158 mm rain
- Gaspar in SeptemberBrazil · 75 kmHigh 22.1°C · Low 15.2°C · 158 mm rain
- Lages in SeptemberBrazil · 95 kmHigh 19.2°C · Low 10.2°C · 166 mm rain
- Jaraguá do Sul in SeptemberBrazil · 99 kmHigh 22.3°C · Low 15.1°C · 151 mm rain
- Camboriú in SeptemberBrazil · 100 kmHigh 21.4°C · Low 16.0°C · 152 mm rain
- Balneário Camboriú in SeptemberBrazil · 103 kmHigh 21.0°C · Low 16.0°C · 152 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rio do Sul) is explained once on the Rio do Sul year overview and on the Sources, method and limits page.