Climate averages 1991–2020
Rio Grande weather
in March.
A warm, wet month: the 3rd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a warm month in Rio Grande: daytime highs average 24.0°C and nights cool to about 21.4°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 92 mm of rain on roughly 10 days, which makes March a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average March day.
The nearest other city in this atlas is Pelotas (37 km away). In March its highs average 25.1°C, 1.1°C warmer than Rio Grande, with 102 mm of rain.
Among the 448 cities listed in Brazil, Rio Grande ranks joint 432nd of 448 for the warmest March highs and 42nd of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Rio Grande is 3.9°C cooler than that mean.
From March to April, average highs fall by 2.3°C to 21.7°C, and monthly rainfall rises from 92 mm to 112 mm.
The annual picture
March 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 Grande climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.6°C21.9°C | 21.9°C | 87 | 8.6 | 14.014 h |
| February | 24.9°C22.3°C | 22.3°C | 85 | 9.8 | 13.213 h |
| March, selected | 24.0°C21.4°C | 21.4°C | 92 | 9.9 | 12.312 h |
| April | 21.7°C18.8°C | 18.8°C | 112 | 10.1 | 11.311 h |
| May | 18.6°C15.8°C | 15.8°C | 104 | 9.8 | 10.511 h |
| June | 16.1°C13.0°C | 13.0°C | 110 | 9.7 | 10.110 h |
| July | 15.0°C11.7°C | 11.7°C | 112 | 10.1 | 10.310 h |
| August | 15.8°C12.5°C | 12.5°C | 108 | 9.6 | 11.011 h |
| September | 16.7°C13.7°C | 13.7°C | 125 | 10.2 | 11.912 h |
| October | 18.9°C16.1°C | 16.1°C | 129 | 10.1 | 12.913 h |
| November | 21.0°C18.0°C | 18.0°C | 87 | 7.7 | 13.714 h |
| December | 23.2°C20.2°C | 20.2°C | 86 | 8.0 | 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
March in nearby cities
- Pelotas in MarchBrazil · 37 kmHigh 25.1°C · Low 19.8°C · 102 mm rain
- Bagé in MarchBrazil · 206 kmHigh 26.3°C · Low 17.2°C · 105 mm rain
- Guaíba in MarchBrazil · 226 kmHigh 27.6°C · Low 19.6°C · 111 mm rain
- Cachoeira do Sul in MarchBrazil · 235 kmHigh 27.5°C · Low 18.7°C · 108 mm rain
- Porto Alegre in MarchBrazil · 238 kmHigh 27.5°C · Low 19.3°C · 111 mm rain
- Viamão in MarchBrazil · 240 kmHigh 26.8°C · Low 19.5°C · 121 mm rain
- Alvorada in MarchBrazil · 246 kmHigh 27.3°C · Low 19.5°C · 121 mm rain
- Canoas in MarchBrazil · 251 kmHigh 27.5°C · Low 19.2°C · 111 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 Grande) is explained once on the Rio Grande year overview and on the Sources, method and limits page.