Climate averages 1991–2020
Guarulhos weather
in January.
A warm, 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 warm month in Guarulhos: daytime highs average 26.4°C and nights cool to about 18.9°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 232 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 24 min on an average January day.
The nearest other city in this atlas is São Paulo (14 km away). In January its highs average 26.4°C, about as warm as Guarulhos, with 222 mm of rain.
Among the 448 cities listed in Brazil, Guarulhos ranks joint 386th of 448 for the warmest January highs and joint 251st of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Guarulhos is 2.1°C cooler than that mean.
From January to February, average highs rise by 0.4°C to 26.8°C, and monthly rainfall falls from 232 mm to 180 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
Guarulhos climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 26.4°C18.9°C | 18.9°C | 232 | 23.8 | 13.413 h |
| February | 26.8°C19.0°C | 19.0°C | 180 | 20.4 | 12.913 h |
| March | 25.7°C18.3°C | 18.3°C | 154 | 20.2 | 12.212 h |
| April | 24.5°C16.7°C | 16.7°C | 64 | 10.6 | 11.612 h |
| May | 22.0°C14.0°C | 14.0°C | 64 | 7.7 | 11.011 h |
| June | 21.5°C12.7°C | 12.7°C | 47 | 5.5 | 10.711 h |
| July | 21.5°C12.0°C | 12.0°C | 54 | 5.7 | 10.811 h |
| August | 22.8°C12.7°C | 12.7°C | 40 | 5.2 | 11.311 h |
| September | 24.1°C14.4°C | 14.4°C | 90 | 9.7 | 11.912 h |
| October | 24.9°C15.9°C | 15.9°C | 116 | 14.6 | 12.613 h |
| November | 24.7°C16.5°C | 16.5°C | 152 | 16.8 | 13.213 h |
| December | 25.9°C18.0°C | 18.0°C | 181 | 20.9 | 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
- São Paulo in JanuaryBrazil · 14 kmHigh 26.4°C · Low 19.0°C · 222 mm rain
- Mairiporã in JanuaryBrazil · 17 kmHigh 26.8°C · Low 19.1°C · 235 mm rain
- São Caetano do Sul in JanuaryBrazil · 18 kmHigh 26.3°C · Low 19.2°C · 232 mm rain
- Ferraz de Vasconcelos in JanuaryBrazil · 19 kmHigh 26.5°C · Low 19.0°C · 253 mm rain
- Itaquaquecetuba in JanuaryBrazil · 19 kmHigh 26.5°C · Low 19.0°C · 253 mm rain
- Santo André in JanuaryBrazil · 22 kmHigh 26.1°C · Low 19.3°C · 337 mm rain
- Arujá in JanuaryBrazil · 23 kmHigh 26.1°C · Low 18.5°C · 253 mm rain
- Caieiras in JanuaryBrazil · 24 kmHigh 26.3°C · Low 18.7°C · 267 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 Guarulhos) is explained once on the Guarulhos year overview and on the Sources, method and limits page.
São Caetano do Sul lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.