Climate averages 1991–2020
Cachoeira do Sul weather
in September.
A mild, wet month: the 8th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Cachoeira do Sul: daytime highs average 21.3°C and nights cool to about 12.0°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 153 mm of rain on roughly 11 days, which makes September a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 53 min on an average September day.
The nearest other city in this atlas is Santa Cruz do Sul (58 km away). In September its highs average 21.5°C, about as warm as Cachoeira do Sul, with 161 mm of rain.
Among the 448 cities listed in Brazil, Cachoeira do Sul ranks 420th of 448 for the warmest September highs and joint 420th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Cachoeira do Sul is 6.2°C cooler than that mean.
From September to October, average highs rise by 2.3°C to 23.7°C, and monthly rainfall rises from 153 mm to 190 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
Cachoeira do Sul climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.3°C20.1°C | 20.1°C | 133 | 13.0 | 13.814 h |
| February | 28.9°C20.1°C | 20.1°C | 118 | 11.9 | 13.213 h |
| March | 27.5°C18.7°C | 18.7°C | 108 | 10.3 | 12.312 h |
| April | 24.5°C15.7°C | 15.7°C | 125 | 9.4 | 11.411 h |
| May | 20.6°C12.3°C | 12.3°C | 120 | 9.0 | 10.611 h |
| June | 18.5°C10.1°C | 10.1°C | 133 | 9.7 | 10.210 h |
| July | 17.9°C9.0°C | 9.0°C | 146 | 10.5 | 10.410 h |
| August | 20.2°C10.3°C | 10.3°C | 121 | 10.0 | 11.011 h |
| September, selected | 21.3°C12.0°C | 12.0°C | 153 | 10.8 | 11.912 h |
| October | 23.7°C14.5°C | 14.5°C | 190 | 12.0 | 12.813 h |
| November | 26.1°C16.1°C | 16.1°C | 126 | 10.0 | 13.614 h |
| December | 28.7°C18.7°C | 18.7°C | 132 | 11.2 | 14.014 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
- Santa Cruz do Sul in SeptemberBrazil · 58 kmHigh 21.5°C · Low 11.9°C · 161 mm rain
- Santa Maria in SeptemberBrazil · 96 kmHigh 21.2°C · Low 11.4°C · 157 mm rain
- Lajeado in SeptemberBrazil · 110 kmHigh 21.8°C · Low 12.0°C · 161 mm rain
- Guaíba in SeptemberBrazil · 151 kmHigh 21.4°C · Low 12.8°C · 146 mm rain
- Porto Alegre in SeptemberBrazil · 160 kmHigh 21.6°C · Low 12.8°C · 146 mm rain
- Bento Gonçalves in SeptemberBrazil · 164 kmHigh 19.9°C · Low 10.1°C · 172 mm rain
- Canoas in SeptemberBrazil · 165 kmHigh 21.7°C · Low 12.8°C · 146 mm rain
- São Leopoldo in SeptemberBrazil · 171 kmHigh 21.8°C · Low 12.6°C · 160 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 Cachoeira do Sul) is explained once on the Cachoeira do Sul year overview and on the Sources, method and limits page.