Climate averages 1991–2020
Guaíba weather
in July.
A mild, wet month: the coolest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Guaíba: daytime highs average 18.3°C and nights cool to about 9.9°C. By daytime temperature it is the coolest month of the year.
Expect about 140 mm of rain on roughly 10 days, which makes July a wet month (the 10th 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 Porto Alegre (13 km away). In July its highs average 18.4°C, about as warm as Guaíba, with 140 mm of rain.
Among the 448 cities listed in Brazil, Guaíba ranks joint 420th of 448 for the warmest July highs and joint 423rd of 448 for the driest July (rainfall, lowest first). The mean July high of those 448 cities is 24.7°C; Guaíba is 6.4°C cooler than that mean.
From July to August, average highs rise by 2.1°C to 20.4°C, and monthly rainfall falls from 140 mm to 120 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
Guaíba climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C20.8°C | 20.8°C | 137 | 14.0 | 13.814 h |
| February | 28.8°C20.9°C | 20.9°C | 128 | 13.5 | 13.213 h |
| March | 27.6°C19.6°C | 19.6°C | 111 | 11.9 | 12.312 h |
| April | 24.9°C16.7°C | 16.7°C | 106 | 9.2 | 11.411 h |
| May | 21.1°C13.3°C | 13.3°C | 107 | 9.2 | 10.611 h |
| June | 18.9°C10.9°C | 10.9°C | 113 | 9.2 | 10.210 h |
| July, selected | 18.3°C9.9°C | 9.9°C | 140 | 10.0 | 10.410 h |
| August | 20.4°C11.0°C | 11.0°C | 120 | 10.2 | 11.011 h |
| September | 21.4°C12.8°C | 12.8°C | 146 | 11.1 | 11.912 h |
| October | 23.7°C15.2°C | 15.2°C | 170 | 12.4 | 12.813 h |
| November | 25.9°C16.9°C | 16.9°C | 122 | 10.9 | 13.614 h |
| December | 28.4°C19.3°C | 19.3°C | 124 | 11.8 | 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
- Porto Alegre in JulyBrazil · 13 kmHigh 18.4°C · Low 9.8°C · 140 mm rain
- Canoas in JulyBrazil · 26 kmHigh 18.5°C · Low 9.8°C · 140 mm rain
- Alvorada in JulyBrazil · 27 kmHigh 18.4°C · Low 10.0°C · 136 mm rain
- Viamão in JulyBrazil · 29 kmHigh 17.9°C · Low 10.1°C · 136 mm rain
- Gravataí in JulyBrazil · 37 kmHigh 18.5°C · Low 9.8°C · 136 mm rain
- São Leopoldo in JulyBrazil · 43 kmHigh 18.7°C · Low 9.7°C · 155 mm rain
- Novo Hamburgo in JulyBrazil · 52 kmHigh 18.5°C · Low 9.1°C · 155 mm rain
- Sapiranga in JulyBrazil · 61 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 Guaíba) is explained once on the Guaíba year overview and on the Sources, method and limits page.
Porto Alegre and Canoas lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.