Climate averages 1991–2020
Viamão weather
in March.
A warm, wet month: the 4th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a warm month in Viamão: daytime highs average 26.8°C and nights cool to about 19.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 121 mm of rain on roughly 13 days, which makes March a wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average March day.
The nearest other city in this atlas is Alvorada (10 km away). In March its highs average 27.3°C, 0.6°C warmer than Viamão, with 121 mm of rain.
Among the 448 cities listed in Brazil, Viamão ranks joint 328th of 448 for the warmest March highs and joint 84th of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Viamão is 1.2°C cooler than that mean.
From March to April, average highs fall by 2.5°C to 24.2°C, and monthly rainfall falls from 121 mm to 102 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
Viamão climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.3°C20.6°C | 20.6°C | 140 | 14.2 | 13.814 h |
| February | 28.0°C20.7°C | 20.7°C | 129 | 14.0 | 13.213 h |
| March, selected | 26.8°C19.5°C | 19.5°C | 121 | 12.6 | 12.312 h |
| April | 24.2°C16.7°C | 16.7°C | 102 | 9.6 | 11.411 h |
| May | 20.6°C13.4°C | 13.4°C | 106 | 9.2 | 10.611 h |
| June | 18.6°C11.0°C | 11.0°C | 112 | 9.4 | 10.210 h |
| July | 17.9°C10.1°C | 10.1°C | 136 | 10.1 | 10.410 h |
| August | 19.9°C11.2°C | 11.2°C | 122 | 10.3 | 11.011 h |
| September | 20.8°C12.9°C | 12.9°C | 147 | 11.2 | 11.912 h |
| October | 23.0°C15.3°C | 15.3°C | 170 | 12.9 | 12.813 h |
| November | 25.0°C16.8°C | 16.8°C | 121 | 10.8 | 13.614 h |
| December | 27.4°C19.2°C | 19.2°C | 129 | 12.5 | 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
March in nearby cities
- Alvorada in MarchBrazil · 10 kmHigh 27.3°C · Low 19.5°C · 121 mm rain
- Gravataí in MarchBrazil · 16 kmHigh 27.3°C · Low 19.0°C · 121 mm rain
- Porto Alegre in MarchBrazil · 21 kmHigh 27.5°C · Low 19.3°C · 111 mm rain
- Canoas in MarchBrazil · 24 kmHigh 27.5°C · Low 19.2°C · 111 mm rain
- Guaíba in MarchBrazil · 29 kmHigh 27.6°C · Low 19.6°C · 111 mm rain
- São Leopoldo in MarchBrazil · 38 kmHigh 27.3°C · Low 18.8°C · 128 mm rain
- Novo Hamburgo in MarchBrazil · 46 kmHigh 26.9°C · Low 18.1°C · 128 mm rain
- Sapiranga in MarchBrazil · 49 kmHigh 27.2°C · Low 18.6°C · 132 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 Viamão) is explained once on the Viamão year overview and on the Sources, method and limits page.
Gravataí and Alvorada lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.