Climate averages 1991–2020
São João da Boa Vista weather
in January.
A warm, very wet month: the 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a warm month in São João da Boa Vista: daytime highs average 27.6°C and nights cool to about 19.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 282 mm of rain on roughly 24 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 18 min on an average January day.
The nearest other city in this atlas is Poços de Caldas (32 km away). In January its highs average 24.9°C, 2.7°C cooler than São João da Boa Vista, with 338 mm of rain.
Among the 448 cities listed in Brazil, São João da Boa Vista ranks joint 298th of 448 for the warmest January highs and joint 387th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; São João da Boa Vista is 0.9°C cooler than that mean.
From January to February, average highs rise by 0.3°C to 27.8°C, and monthly rainfall falls from 282 mm to 213 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 João da Boa Vista climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 27.6°C19.5°C | 19.5°C | 282 | 24.0 | 13.313 h |
| February | 27.8°C19.4°C | 19.4°C | 213 | 20.3 | 12.813 h |
| March | 27.2°C18.6°C | 18.6°C | 183 | 19.9 | 12.212 h |
| April | 26.3°C16.7°C | 16.7°C | 80 | 10.3 | 11.612 h |
| May | 23.9°C13.7°C | 13.7°C | 56 | 6.4 | 11.111 h |
| June | 23.5°C12.5°C | 12.5°C | 32 | 4.1 | 10.811 h |
| July | 23.8°C12.2°C | 12.2°C | 27 | 3.3 | 10.911 h |
| August | 25.8°C13.5°C | 13.5°C | 26 | 3.7 | 11.411 h |
| September | 27.7°C16.2°C | 16.2°C | 77 | 8.7 | 12.012 h |
| October | 28.1°C18.0°C | 18.0°C | 122 | 14.5 | 12.613 h |
| November | 27.2°C18.4°C | 18.4°C | 191 | 19.4 | 13.113 h |
| December | 27.5°C19.2°C | 19.2°C | 245 | 23.4 | 13.413 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
- Poços de Caldas in JanuaryBrazil · 32 kmHigh 24.9°C · Low 17.7°C · 338 mm rain
- Mogi Guaçu in JanuaryBrazil · 47 kmHigh 28.4°C · Low 20.0°C · 263 mm rain
- Itapira in JanuaryBrazil · 52 kmHigh 28.2°C · Low 19.9°C · 255 mm rain
- Mogi Mirim in JanuaryBrazil · 54 kmHigh 28.3°C · Low 19.9°C · 275 mm rain
- Pirassununga in JanuaryBrazil · 65 kmHigh 28.2°C · Low 20.1°C · 251 mm rain
- Leme in JanuaryBrazil · 66 kmHigh 28.2°C · Low 20.1°C · 285 mm rain
- Araras in JanuaryBrazil · 74 kmHigh 28.1°C · Low 20.1°C · 285 mm rain
- Cosmópolis in JanuaryBrazil · 86 kmHigh 28.4°C · Low 20.2°C · 270 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 João da Boa Vista) is explained once on the São João da Boa Vista year overview and on the Sources, method and limits page.