Climate averages 1991–2020
Viamão weather
in April.
A warm, wet month: the 6th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a warm month in Viamão: daytime highs average 24.2°C and nights cool to about 16.7°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 102 mm of rain on roughly 10 days, which makes April a wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 23 min on an average April day.
The nearest other city in this atlas is Alvorada (10 km away). In April its highs average 24.8°C, 0.5°C warmer than Viamão, with 102 mm of rain.
Among the 448 cities listed in Brazil, Viamão ranks joint 408th of 448 for the warmest April highs and joint 281st of 448 for the driest April (rainfall, lowest first). The mean April high of those 448 cities is 27.0°C; Viamão is 2.8°C cooler than that mean.
From April to May, average highs fall by 3.6°C to 20.6°C, and monthly rainfall rises from 102 mm to 106 mm.
The annual picture
April 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 | 26.8°C19.5°C | 19.5°C | 121 | 12.6 | 12.312 h |
| April, selected | 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
April in nearby cities
- Alvorada in AprilBrazil · 10 kmHigh 24.8°C · Low 16.7°C · 102 mm rain
- Gravataí in AprilBrazil · 16 kmHigh 24.7°C · Low 16.3°C · 102 mm rain
- Porto Alegre in AprilBrazil · 21 kmHigh 24.9°C · Low 16.5°C · 106 mm rain
- Canoas in AprilBrazil · 24 kmHigh 24.8°C · Low 16.5°C · 106 mm rain
- Guaíba in AprilBrazil · 29 kmHigh 24.9°C · Low 16.7°C · 106 mm rain
- São Leopoldo in AprilBrazil · 38 kmHigh 24.7°C · Low 16.1°C · 118 mm rain
- Novo Hamburgo in AprilBrazil · 46 kmHigh 24.4°C · Low 15.5°C · 118 mm rain
- Sapiranga in AprilBrazil · 49 kmHigh 24.8°C · Low 16.2°C · 109 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.