Climate averages 1991–2020
Piracicaba weather
in December.
A hot, very wet month: the 3rd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Piracicaba: daytime highs average 28.8°C and nights cool to about 19.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 190 mm of rain on roughly 20 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average December day.
The nearest other city in this atlas is Santa Bárbara d'Oeste (24 km away). In December its highs average 28.4°C, about as warm as Piracicaba, with 206 mm of rain.
Among the 448 cities listed in Brazil, Piracicaba ranks joint 192nd of 448 for the warmest December highs and joint 235th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Piracicaba is 0.3°C warmer than that mean.
From December to January, average highs fall by 0.1°C to 28.6°C, and monthly rainfall rises from 190 mm to 255 mm.
The annual picture
December 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
Piracicaba climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C20.4°C | 20.4°C | 255 | 22.2 | 13.413 h |
| February | 28.9°C20.4°C | 20.4°C | 187 | 19.2 | 12.913 h |
| March | 28.1°C19.6°C | 19.6°C | 144 | 17.0 | 12.212 h |
| April | 27.2°C17.7°C | 17.7°C | 53 | 7.3 | 11.612 h |
| May | 24.6°C14.7°C | 14.7°C | 52 | 6.0 | 11.011 h |
| June | 24.1°C13.3°C | 13.3°C | 38 | 4.4 | 10.811 h |
| July | 24.4°C12.8°C | 12.8°C | 31 | 3.8 | 10.911 h |
| August | 26.5°C13.8°C | 13.8°C | 30 | 3.9 | 11.311 h |
| September | 28.4°C16.3°C | 16.3°C | 61 | 7.9 | 11.912 h |
| October | 28.9°C18.0°C | 18.0°C | 104 | 12.1 | 12.613 h |
| November | 28.3°C18.6°C | 18.6°C | 148 | 14.9 | 13.213 h |
| December, selected | 28.8°C19.9°C | 19.9°C | 190 | 19.8 | 13.513 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
December in nearby cities
- Santa Bárbara d'Oeste in DecemberBrazil · 24 kmHigh 28.4°C · Low 19.7°C · 206 mm rain
- Limeira in DecemberBrazil · 31 kmHigh 28.5°C · Low 19.7°C · 229 mm rain
- Americana in DecemberBrazil · 33 kmHigh 28.4°C · Low 19.7°C · 211 mm rain
- Rio Claro in DecemberBrazil · 36 kmHigh 28.0°C · Low 19.4°C · 229 mm rain
- Sumaré in DecemberBrazil · 41 kmHigh 28.3°C · Low 19.6°C · 211 mm rain
- Hortolândia in DecemberBrazil · 46 kmHigh 28.2°C · Low 19.5°C · 211 mm rain
- Cosmópolis in DecemberBrazil · 47 kmHigh 28.4°C · Low 19.7°C · 211 mm rain
- Araras in DecemberBrazil · 49 kmHigh 28.1°C · Low 19.6°C · 235 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 Piracicaba) is explained once on the Piracicaba year overview and on the Sources, method and limits page.