Climate averages 1991–2020
Jundiaí 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 Jundiaí: daytime highs average 26.9°C and nights cool to about 19.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 243 mm of rain on roughly 22 days, which makes January a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 23 min on an average January day.
The nearest other city in this atlas is Várzea Paulista (6 km away). In January its highs average 26.8°C, about as warm as Jundiaí, with 267 mm of rain.
Among the 448 cities listed in Brazil, Jundiaí ranks joint 351st of 448 for the warmest January highs and joint 289th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Jundiaí is 1.6°C cooler than that mean.
From January to February, average highs rise by 0.3°C to 27.2°C, and monthly rainfall falls from 243 mm to 170 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
Jundiaí climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 26.9°C19.0°C | 19.0°C | 243 | 22.1 | 13.413 h |
| February | 27.2°C19.0°C | 19.0°C | 170 | 19.1 | 12.913 h |
| March | 26.3°C18.3°C | 18.3°C | 135 | 17.6 | 12.212 h |
| April | 25.1°C16.6°C | 16.6°C | 64 | 8.6 | 11.612 h |
| May | 22.6°C13.8°C | 13.8°C | 64 | 6.7 | 11.011 h |
| June | 22.0°C12.3°C | 12.3°C | 49 | 5.2 | 10.711 h |
| July | 22.1°C11.6°C | 11.6°C | 46 | 4.7 | 10.911 h |
| August | 23.8°C12.5°C | 12.5°C | 37 | 4.6 | 11.311 h |
| September | 25.4°C14.7°C | 14.7°C | 86 | 8.9 | 11.912 h |
| October | 26.2°C16.3°C | 16.3°C | 118 | 13.1 | 12.613 h |
| November | 25.8°C16.9°C | 16.9°C | 151 | 15.6 | 13.213 h |
| December | 26.7°C18.3°C | 18.3°C | 189 | 19.9 | 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
- Várzea Paulista in JanuaryBrazil · 6 kmHigh 26.8°C · Low 18.8°C · 267 mm rain
- Francisco Morato in JanuaryBrazil · 18 kmHigh 26.4°C · Low 18.6°C · 267 mm rain
- Itatiba in JanuaryBrazil · 21 kmHigh 26.9°C · Low 19.0°C · 279 mm rain
- Caieiras in JanuaryBrazil · 25 kmHigh 26.3°C · Low 18.7°C · 267 mm rain
- Valinhos in JanuaryBrazil · 27 kmHigh 27.5°C · Low 19.5°C · 259 mm rain
- Santana de Parnaíba in JanuaryBrazil · 29 kmHigh 26.8°C · Low 19.2°C · 230 mm rain
- Mairiporã in JanuaryBrazil · 34 kmHigh 26.8°C · Low 19.1°C · 235 mm rain
- Atibaia in JanuaryBrazil · 35 kmHigh 26.6°C · Low 18.6°C · 244 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 Jundiaí) is explained once on the Jundiaí year overview and on the Sources, method and limits page.