Climate averages 1991–2020
Jacareí 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 Jacareí: daytime highs average 26.1°C and nights cool to about 16.6°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 109 mm of rain on roughly 14 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 José dos Campos (16 km away). In October its highs average 26.4°C, about as warm as Jacareí, with 109 mm of rain.
Among the 448 cities listed in Brazil, Jacareí ranks joint 331st of 448 for the warmest October highs and joint 212th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Jacareí is 2.2°C cooler than that mean.
From October to November, average highs fall by 0.2°C to 25.9°C, and monthly rainfall rises from 109 mm to 142 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
Jacareí climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.4°C19.5°C | 19.5°C | 226 | 21.9 | 13.413 h |
| February | 27.8°C19.6°C | 19.6°C | 173 | 18.6 | 12.913 h |
| March | 26.7°C18.9°C | 18.9°C | 139 | 18.0 | 12.212 h |
| April | 25.5°C17.2°C | 17.2°C | 57 | 9.5 | 11.612 h |
| May | 23.0°C14.3°C | 14.3°C | 57 | 7.6 | 11.011 h |
| June | 22.6°C12.8°C | 12.8°C | 38 | 5.1 | 10.711 h |
| July | 22.5°C12.0°C | 12.0°C | 44 | 5.1 | 10.811 h |
| August | 23.9°C12.9°C | 12.9°C | 35 | 5.3 | 11.311 h |
| September | 25.2°C14.9°C | 14.9°C | 77 | 9.9 | 11.912 h |
| October, selected | 26.1°C16.6°C | 16.6°C | 109 | 13.5 | 12.613 h |
| November | 25.9°C17.3°C | 17.3°C | 142 | 16.6 | 13.213 h |
| December | 27.0°C18.7°C | 18.7°C | 172 | 20.1 | 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 José dos Campos in OctoberBrazil · 16 kmHigh 26.4°C · Low 16.7°C · 109 mm rain
- Mogi das Cruzes in OctoberBrazil · 33 kmHigh 24.7°C · Low 15.8°C · 117 mm rain
- Caçapava in OctoberBrazil · 35 kmHigh 26.5°C · Low 16.8°C · 137 mm rain
- Arujá in OctoberBrazil · 38 kmHigh 24.8°C · Low 15.6°C · 117 mm rain
- Itaquaquecetuba in OctoberBrazil · 44 kmHigh 24.8°C · Low 16.0°C · 117 mm rain
- Ferraz de Vasconcelos in OctoberBrazil · 49 kmHigh 24.9°C · Low 16.0°C · 117 mm rain
- Taubaté in OctoberBrazil · 52 kmHigh 26.4°C · Low 16.5°C · 125 mm rain
- Guarulhos in OctoberBrazil · 61 kmHigh 24.9°C · Low 15.9°C · 116 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 Jacareí) is explained once on the Jacareí year overview and on the Sources, method and limits page.
São José dos Campos lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.