Climate averages 1991–2020
Guarulhos weather
in October.
A warm, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Guarulhos: daytime highs average 24.9°C and nights cool to about 15.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 116 mm of rain on roughly 15 days, which makes October a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 37 min on an average October day.
The nearest other city in this atlas is São Paulo (14 km away). In October its highs average 25.0°C, about as warm as Guarulhos, with 109 mm of rain.
Among the 448 cities listed in Brazil, Guarulhos ranks joint 363rd of 448 for the warmest October highs and joint 253rd of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Guarulhos is 3.4°C cooler than that mean.
From October to November, average highs fall by 0.2°C to 24.7°C, and monthly rainfall rises from 116 mm to 152 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- São Paulo in OctoberBrazil · 14 kmHigh 25.0°C · Low 16.0°C · 109 mm rain
- Mairiporã in OctoberBrazil · 17 kmHigh 25.8°C · Low 16.5°C · 118 mm rain
- São Caetano do Sul in OctoberBrazil · 18 kmHigh 24.6°C · Low 16.0°C · 116 mm rain
- Ferraz de Vasconcelos in OctoberBrazil · 19 kmHigh 24.9°C · Low 16.0°C · 117 mm rain
- Itaquaquecetuba in OctoberBrazil · 19 kmHigh 24.8°C · Low 16.0°C · 117 mm rain
- Santo André in OctoberBrazil · 22 kmHigh 24.0°C · Low 16.0°C · 157 mm rain
- Arujá in OctoberBrazil · 23 kmHigh 24.8°C · Low 15.6°C · 117 mm rain
- Caieiras in OctoberBrazil · 24 kmHigh 25.2°C · Low 15.9°C · 132 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.