Jacareí climate
Jacareí (São Paulo, Brazil) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 21 °C70 °F, and about 1,380 mm54 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Jacareí climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2882 | 2067 | 2475 | 2279.0 |
| Feb | 2882 | 1967 | 2475 | 1787.0 |
| Mar | 2781 | 1966 | 2373 | 1536.0 |
| Apr | 2678 | 1763 | 2170 | 913.6 |
| May | 2374 | 1457 | 1965 | 682.7 |
| Jun | 2373 | 1355 | 1864 | 552.1 |
| Jul | 2373 | 1254 | 1763 | 622.5 |
| Aug | 2576 | 1355 | 1965 | 371.4 |
| Sep | 2680 | 1457 | 2069 | 672.7 |
| Oct | 2882 | 1661 | 2271 | 1064.2 |
| Nov | 2781 | 1762 | 2272 | 1515.9 |
| Dec | 2882 | 1965 | 2374 | 1847.2 |
| Year | 2882 | 1254 | 2170 | 1,38054 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 83% | 76% | 5.5 | 13:25 |
| Feb | 83% | 67% | 5.7 | 12:54 |
| Mar | 85% | 66% | 5.1 | 12:17 |
| Apr | 85% | 61% | 4.5 | 11:35 |
| May | 84% | 62% | 3.6 | 11:00 |
| Jun | 82% | 54% | 3.3 | 10:42 |
| Jul | 79% | 50% | 3.5 | 10:50 |
| Aug | 75% | 50% | 4.2 | 11:19 |
| Sep | 74% | 63% | 4.4 | 11:00 |
| Oct | 77% | 72% | 4.9 | 12:41 |
| Nov | 80% | 77% | 5.3 | 13:17 |
| Dec | 81% | 78% | 5.6 | 13:34 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Jacareí is like
The warmest month is February, with an average high of 28 °C82 °F and a low of 19 °C67 °F. The coldest is July, when highs average 23 °C73 °F and lows 12 °C54 °F. Seasonal differences are small — just 6.3 °C11.4 °F between the warmest and the coolest month.
It is wet, with about 1,380 mm54 in of precipitation per year. The wettest three-month stretch is December–February, which brings 43% of the annual total. The wettest month is January (227 mm9.0 in), the driest is August (37 mm1.4 in).
Relative humidity ranges from 74% in September to 85% in March. The clearest skies (lowest average cloud amount, 50%) are typical of August. Average wind speed near the ground ranges from 7 km/h (4 mph) in June to 10 km/h (6 mph) in November. Daylight lasts from about 10.7 hours in June to 13.6 hours in December.
Best time to visit Jacareí
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–September: average highs of 23 °C73 °F to 26 °C80 °F with 37 mm1.4 in to 68 mm2.7 in of precipitation per month.
The most challenging month is January, which is very wet (227 mm9.0 in) and humid (83% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Jacareí
- Wetter months (November–March) — highs 2781 to 28 °C82 °F, lows 1762 to 20 °C67 °F, about 179 mm7.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Drier months (April–October) — highs 2373 to 28 °C82 °F, lows 1254 to 17 °C63 °F, about 69 mm2.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Jacareí compares
Compared with São José dos Campos, about 16 km to the northeast, Jacareí is on average 0.5 °C0.8 °F cooler and receives a similar amount of precipitation. The difference is largest in September (1.1 °C2 °F cooler).
Of the 223 places in Brazil covered by World Climates, Jacareí is the 178th warmest by annual mean temperature and the 84th wettest by annual precipitation. See all of them on the Brazil climate page.
Places in other countries with the most similar temperature and rainfall pattern: Port Macquarie (Australia, Cfa), Brisbane (Australia, Cfa) and Sunshine Coast (Australia, Cfa).
Nearby places
- São José dos Campos 16 km · 21 °C70 °F · 1,353 mm53 in
- Guarulhos 61 km · 20 °C67 °F · 1,380 mm54 in
- Atibaia 63 km · 20 °C68 °F · 1,366 mm54 in
- Caraguatatuba 66 km · 25 °C76 °F · 1,410 mm56 in
- Pindamonhangaba 67 km · 22 °C71 °F · 1,353 mm53 in
- Bragança Paulista 71 km · 20 °C68 °F · 1,366 mm54 in
- São Paulo 74 km · 20 °C68 °F · 1,352 mm53 in
- Santos 82 km · 24 °C75 °F · 1,370 mm54 in
Frequently asked questions
What is the warmest month in Jacareí?
February is the warmest month in Jacareí, with an average high of 28 °C (82 °F) and an average low of 19 °C (67 °F).
What is the coldest month in Jacareí?
July is the coldest month, with an average high of 23 °C (73 °F) and an average low of 12 °C (54 °F).
When does it rain the most in Jacareí?
January is the wettest month with about 227 mm (9.0 in) of precipitation; August is the driest with about 37 mm (1.4 in).
What is the best time to visit Jacareí?
Judging by long-term averages, the most comfortable months are May–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 699 m, while Jacareí lies at about 574 m. Temperatures on this page were therefore adjusted by +0.8 °C1.5 °F using the standard lapse rate of 6.5 °C per 1,000 m.