Climate averages 1991–2020
Rio do Sul weather
in May.
A mild, wet month: the 9th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Rio do Sul: daytime highs average 21.0°C and nights cool to about 13.1°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 105 mm of rain on roughly 9 days, which makes May a wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 48 min on an average May day.
The nearest other city in this atlas is Indaial (54 km away). In May its highs average 22.1°C, 1.1°C warmer than Rio do Sul, with 112 mm of rain.
Among the 448 cities listed in Brazil, Rio do Sul ranks joint 406th of 448 for the warmest May highs and joint 312th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Rio do Sul is 4.3°C cooler than that mean.
From May to June, average highs fall by 1.5°C to 19.5°C, and monthly rainfall rises from 105 mm to 111 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Indaial in MayBrazil · 54 kmHigh 22.1°C · Low 14.5°C · 112 mm rain
- Blumenau in MayBrazil · 66 kmHigh 22.3°C · Low 15.0°C · 109 mm rain
- Brusque in MayBrazil · 73 kmHigh 22.6°C · Low 15.0°C · 109 mm rain
- Gaspar in MayBrazil · 75 kmHigh 22.4°C · Low 15.2°C · 109 mm rain
- Lages in MayBrazil · 95 kmHigh 17.5°C · Low 9.5°C · 131 mm rain
- Jaraguá do Sul in MayBrazil · 99 kmHigh 22.6°C · Low 15.4°C · 102 mm rain
- Camboriú in MayBrazil · 100 kmHigh 22.4°C · Low 16.6°C · 115 mm rain
- Balneário Camboriú in MayBrazil · 103 kmHigh 22.1°C · Low 16.7°C · 115 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.