Climate averages 1991–2020
Uruguaiana weather
in September.
A warm, wet month: the 8th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Uruguaiana: daytime highs average 22.0°C and nights cool to about 12.6°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 126 mm of rain on roughly 9 days, which makes September a wet month (the 6th 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 Alegrete (125 km away). In September its highs average 21.7°C, about as warm as Uruguaiana, with 155 mm of rain.
Among the 448 cities listed in Brazil, Uruguaiana ranks joint 399th of 448 for the warmest September highs and joint 370th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Uruguaiana is 5.5°C cooler than that mean.
From September to October, average highs rise by 2.6°C to 24.6°C, and monthly rainfall rises from 126 mm to 189 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
Uruguaiana climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.6°C21.6°C | 21.6°C | 139 | 10.4 | 13.814 h |
| February | 29.6°C21.0°C | 21.0°C | 128 | 10.4 | 13.113 h |
| March | 28.0°C19.3°C | 19.3°C | 124 | 9.2 | 12.312 h |
| April | 24.6°C16.3°C | 16.3°C | 177 | 9.3 | 11.411 h |
| May | 20.7°C13.1°C | 13.1°C | 115 | 8.0 | 10.611 h |
| June | 18.4°C10.9°C | 10.9°C | 113 | 8.5 | 10.310 h |
| July | 17.8°C9.7°C | 9.7°C | 103 | 7.5 | 10.410 h |
| August | 20.4°C11.1°C | 11.1°C | 89 | 7.8 | 11.111 h |
| September, selected | 22.0°C12.6°C | 12.6°C | 126 | 9.0 | 11.912 h |
| October | 24.6°C15.4°C | 15.4°C | 189 | 10.9 | 12.813 h |
| November | 27.3°C17.4°C | 17.4°C | 136 | 8.4 | 13.614 h |
| December | 29.8°C20.1°C | 20.1°C | 136 | 9.4 | 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
- Alegrete in SeptemberBrazil · 125 kmHigh 21.7°C · Low 12.1°C · 155 mm rain
- Rivera in SeptemberUruguay · 195 kmHigh 20.0°C · Low 10.7°C · 131 mm rain
- Sant'Ana do Livramento in SeptemberBrazil · 196 kmHigh 19.8°C · Low 10.3°C · 131 mm rain
- Concordia in SeptemberArgentina · 203 kmHigh 20.8°C · Low 11.3°C · 91 mm rain
- Goya in SeptemberArgentina · 221 kmHigh 22.9°C · Low 13.5°C · 94 mm rain
- Ituzaingó in SeptemberArgentina · 244 kmHigh 24.0°C · Low 15.3°C · 139 mm rain
- Reconquista in SeptemberArgentina · 257 kmHigh 23.0°C · Low 13.2°C · 93 mm rain
- Posadas in SeptemberArgentina · 286 kmHigh 24.3°C · Low 15.0°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 Uruguaiana) is explained once on the Uruguaiana year overview and on the Sources, method and limits page.