Climate averages 1991–2020
Itanhaém weather
in December.
A warm, wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Itanhaém: daytime highs average 27.4°C and nights cool to about 21.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 174 mm of rain on roughly 19 days, which makes December a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 36 min on an average December day.
The nearest other city in this atlas is Praia Grande (44 km away). In December its highs average 27.8°C, about as warm as Itanhaém, with 234 mm of rain.
Among the 448 cities listed in Brazil, Itanhaém ranks joint 287th of 448 for the warmest December highs and joint 188th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Itanhaém is 1.1°C cooler than that mean.
From December to January, average highs rise by 0.9°C to 28.3°C, and monthly rainfall rises from 174 mm to 227 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
Itanhaém climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.3°C22.7°C | 22.7°C | 227 | 22.9 | 13.413 h |
| February | 28.6°C22.8°C | 22.8°C | 213 | 19.8 | 12.913 h |
| March | 27.6°C22.1°C | 22.1°C | 212 | 21.5 | 12.212 h |
| April | 26.4°C20.4°C | 20.4°C | 137 | 14.5 | 11.512 h |
| May | 24.1°C17.8°C | 17.8°C | 125 | 13.6 | 11.011 h |
| June | 23.4°C16.4°C | 16.4°C | 101 | 10.1 | 10.711 h |
| July | 22.8°C15.6°C | 15.6°C | 107 | 10.3 | 10.811 h |
| August | 23.1°C15.8°C | 15.8°C | 88 | 10.2 | 11.311 h |
| September | 23.8°C17.2°C | 17.2°C | 141 | 14.2 | 11.912 h |
| October | 24.9°C18.8°C | 18.8°C | 155 | 17.0 | 12.613 h |
| November | 25.7°C19.8°C | 19.8°C | 163 | 16.9 | 13.313 h |
| December, selected | 27.4°C21.5°C | 21.5°C | 174 | 19.2 | 13.614 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
- Praia Grande in DecemberBrazil · 44 kmHigh 27.8°C · Low 22.1°C · 234 mm rain
- São Vicente in DecemberBrazil · 47 kmHigh 27.9°C · Low 22.2°C · 234 mm rain
- Itapecerica da Serra in DecemberBrazil · 52 kmHigh 24.7°C · Low 17.2°C · 222 mm rain
- Santos in DecemberBrazil · 52 kmHigh 27.4°C · Low 22.2°C · 179 mm rain
- São Bernardo do Campo in DecemberBrazil · 59 kmHigh 25.4°C · Low 18.2°C · 250 mm rain
- Embu das Artes in DecemberBrazil · 60 kmHigh 25.9°C · Low 18.1°C · 222 mm rain
- Taboão da Serra in DecemberBrazil · 62 kmHigh 25.6°C · Low 17.9°C · 222 mm rain
- Santo André in DecemberBrazil · 63 kmHigh 25.5°C · Low 18.3°C · 250 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 Itanhaém) is explained once on the Itanhaém year overview and on the Sources, method and limits page.