Climate averages 1991–2020
São Gonçalo weather
in January.
A hot, very wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in São Gonçalo: daytime highs average 30.1°C and nights cool to about 23.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 244 mm of rain on roughly 20 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 22 min on an average January day.
The nearest other city in this atlas is Rio de Janeiro (16 km away). In January its highs average 30.7°C, 0.6°C warmer than São Gonçalo, with 170 mm of rain.
Among the 448 cities listed in Brazil, São Gonçalo ranks joint 78th of 448 for the warmest January highs and joint 293rd of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; São Gonçalo is 1.6°C warmer than that mean.
From January to February, average highs rise by 0.4°C to 30.5°C, and monthly rainfall falls from 244 mm to 183 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Rio de Janeiro in JanuaryBrazil · 16 kmHigh 30.7°C · Low 23.5°C · 170 mm rain
- Magé in JanuaryBrazil · 19 kmHigh 30.1°C · Low 22.7°C · 244 mm rain
- Itaboraí in JanuaryBrazil · 22 kmHigh 29.7°C · Low 22.5°C · 259 mm rain
- Maricá in JanuaryBrazil · 26 kmHigh 29.9°C · Low 23.9°C · 126 mm rain
- Duque de Caxias in JanuaryBrazil · 27 kmHigh 30.9°C · Low 23.2°C · 265 mm rain
- Belford Roxo in JanuaryBrazil · 36 kmHigh 31.0°C · Low 23.4°C · 235 mm rain
- Barra da Tijuca in JanuaryBrazil · 37 kmHigh 31.2°C · Low 23.9°C · 170 mm rain
- Petrópolis in JanuaryBrazil · 38 kmHigh 26.9°C · Low 19.6°C · 315 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.