Climate averages 1991–2020
São Gonçalo weather
in August.
A warm, moderately wet month: the 9th warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in São Gonçalo: daytime highs average 25.3°C and nights cool to about 16.8°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 44 mm of rain on roughly 7 days, which makes August a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 20 min on an average August day.
The nearest other city in this atlas is Rio de Janeiro (16 km away). In August its highs average 25.9°C, 0.6°C warmer than São Gonçalo, with 41 mm of rain.
Among the 448 cities listed in Brazil, São Gonçalo ranks joint 251st of 448 for the warmest August highs and joint 289th of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; São Gonçalo is 0.9°C cooler than that mean.
From August to September, average highs rise by 1.0°C to 26.3°C, and monthly rainfall rises from 44 mm to 85 mm.
The annual picture
August 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
São Gonçalo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.1°C23.0°C | 23.0°C | 244 | 20.4 | 13.413 h |
| February | 30.5°C23.1°C | 23.1°C | 183 | 17.0 | 12.913 h |
| March | 29.0°C22.4°C | 22.4°C | 205 | 19.6 | 12.212 h |
| April | 27.3°C20.8°C | 20.8°C | 101 | 13.2 | 11.612 h |
| May | 25.0°C18.3°C | 18.3°C | 75 | 10.5 | 11.011 h |
| June | 24.6°C17.1°C | 17.1°C | 48 | 7.0 | 10.811 h |
| July | 24.3°C16.4°C | 16.4°C | 49 | 7.2 | 10.911 h |
| August, selected | 25.3°C16.8°C | 16.8°C | 44 | 7.3 | 11.311 h |
| September | 26.3°C18.1°C | 18.1°C | 85 | 10.7 | 11.912 h |
| October | 27.4°C19.6°C | 19.6°C | 114 | 13.3 | 12.613 h |
| November | 27.4°C20.5°C | 20.5°C | 204 | 18.0 | 13.213 h |
| December | 29.1°C22.1°C | 22.1°C | 229 | 19.9 | 13.514 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
August in nearby cities
- Rio de Janeiro in AugustBrazil · 16 kmHigh 25.9°C · Low 17.5°C · 41 mm rain
- Magé in AugustBrazil · 19 kmHigh 25.3°C · Low 16.0°C · 44 mm rain
- Itaboraí in AugustBrazil · 22 kmHigh 24.9°C · Low 15.8°C · 43 mm rain
- Maricá in AugustBrazil · 26 kmHigh 25.1°C · Low 18.2°C · 38 mm rain
- Duque de Caxias in AugustBrazil · 27 kmHigh 26.1°C · Low 16.7°C · 44 mm rain
- Belford Roxo in AugustBrazil · 36 kmHigh 26.3°C · Low 16.8°C · 32 mm rain
- Barra da Tijuca in AugustBrazil · 37 kmHigh 26.5°C · Low 17.5°C · 41 mm rain
- Petrópolis in AugustBrazil · 38 kmHigh 22.5°C · Low 13.5°C · 42 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 São Gonçalo) is explained once on the São Gonçalo year overview and on the Sources, method and limits page.
Magé lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.