Climate averages 1991–2020
Pelotas weather
in September.
A mild, wet month: the 9th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Pelotas: daytime highs average 18.4°C and nights cool to about 12.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 141 mm of rain on roughly 11 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 52 min on an average September day.
The nearest other city in this atlas is Rio Grande (37 km away). In September its highs average 16.7°C, 1.6°C cooler than Pelotas, with 125 mm of rain.
Among the 448 cities listed in Brazil, Pelotas ranks 447th of 448 for the warmest September highs and joint 394th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Pelotas is 9.2°C cooler than that mean.
From September to October, average highs rise by 2.2°C to 20.6°C, and monthly rainfall falls from 141 mm to 140 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
Pelotas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.3°C20.8°C | 20.8°C | 109 | 11.6 | 14.014 h |
| February | 26.2°C21.0°C | 21.0°C | 106 | 12.6 | 13.213 h |
| March | 25.1°C19.8°C | 19.8°C | 102 | 11.7 | 12.312 h |
| April | 22.6°C17.0°C | 17.0°C | 116 | 10.1 | 11.311 h |
| May | 19.3°C13.8°C | 13.8°C | 105 | 9.3 | 10.511 h |
| June | 17.0°C11.2°C | 11.2°C | 111 | 9.8 | 10.110 h |
| July | 16.2°C10.1°C | 10.1°C | 117 | 10.2 | 10.310 h |
| August | 17.6°C11.1°C | 11.1°C | 116 | 9.9 | 11.011 h |
| September, selected | 18.4°C12.5°C | 12.5°C | 141 | 10.6 | 11.912 h |
| October | 20.6°C15.0°C | 15.0°C | 140 | 10.6 | 12.813 h |
| November | 22.8°C16.8°C | 16.8°C | 95 | 8.6 | 13.714 h |
| December | 25.2°C19.1°C | 19.1°C | 100 | 9.8 | 14.214 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
- Rio Grande in SeptemberBrazil · 37 kmHigh 16.7°C · Low 13.7°C · 125 mm rain
- Bagé in SeptemberBrazil · 174 kmHigh 19.6°C · Low 10.4°C · 139 mm rain
- Cachoeira do Sul in SeptemberBrazil · 200 kmHigh 21.3°C · Low 12.0°C · 153 mm rain
- Guaíba in SeptemberBrazil · 208 kmHigh 21.4°C · Low 12.8°C · 146 mm rain
- Porto Alegre in SeptemberBrazil · 220 kmHigh 21.6°C · Low 12.8°C · 146 mm rain
- Viamão in SeptemberBrazil · 226 kmHigh 20.8°C · Low 12.9°C · 147 mm rain
- Santa Cruz do Sul in SeptemberBrazil · 228 kmHigh 21.5°C · Low 11.9°C · 161 mm rain
- Alvorada in SeptemberBrazil · 231 kmHigh 21.5°C · Low 12.9°C · 147 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 Pelotas) is explained once on the Pelotas year overview and on the Sources, method and limits page.