Climate averages 1991–2020
Viamão weather
in July.
A mild, wet month: the coolest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Viamão: daytime highs average 17.9°C and nights cool to about 10.1°C. By daytime temperature it is the coolest month of the year.
Expect about 136 mm of rain on roughly 10 days, which makes July a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 24 min on an average July day.
The nearest other city in this atlas is Alvorada (10 km away). In July its highs average 18.4°C, about as warm as Viamão, with 136 mm of rain.
Among the 448 cities listed in Brazil, Viamão ranks joint 427th of 448 for the warmest July highs and joint 416th of 448 for the driest July (rainfall, lowest first). The mean July high of those 448 cities is 24.7°C; Viamão is 6.8°C cooler than that mean.
From July to August, average highs rise by 1.9°C to 19.9°C, and monthly rainfall falls from 136 mm to 122 mm.
The annual picture
July 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 | 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, selected | 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
July in nearby cities
- Alvorada in JulyBrazil · 10 kmHigh 18.4°C · Low 10.0°C · 136 mm rain
- Gravataí in JulyBrazil · 16 kmHigh 18.5°C · Low 9.8°C · 136 mm rain
- Porto Alegre in JulyBrazil · 21 kmHigh 18.4°C · Low 9.8°C · 140 mm rain
- Canoas in JulyBrazil · 24 kmHigh 18.5°C · Low 9.8°C · 140 mm rain
- Guaíba in JulyBrazil · 29 kmHigh 18.3°C · Low 9.9°C · 140 mm rain
- São Leopoldo in JulyBrazil · 38 kmHigh 18.7°C · Low 9.7°C · 155 mm rain
- Novo Hamburgo in JulyBrazil · 46 kmHigh 18.5°C · Low 9.1°C · 155 mm rain
- Sapiranga in JulyBrazil · 49 kmHigh 19.2°C · Low 10.2°C · 145 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.