Climate averages 1991–2020
São João del Rei weather
in December.
A warm, very wet month: the joint 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in São João del Rei: daytime highs average 25.8°C and nights cool to about 18.0°C. By daytime temperature it is the joint 4th warmest of the 12 months.
Expect about 238 mm of rain on roughly 22 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 23 min on an average December day.
The nearest other city in this atlas is Barbacena (52 km away). In December its highs average 24.0°C, 1.8°C cooler than São João del Rei, with 306 mm of rain.
Among the 448 cities listed in Brazil, São João del Rei ranks joint 406th of 448 for the warmest December highs and joint 359th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; São João del Rei is 2.7°C cooler than that mean.
From December to January, average highs rise by 0.5°C to 26.3°C, and monthly rainfall falls from 238 mm to 228 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
São João del Rei climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.3°C18.4°C | 18.4°C | 228 | 20.5 | 13.313 h |
| February | 26.8°C18.4°C | 18.4°C | 136 | 15.8 | 12.813 h |
| March | 25.8°C17.9°C | 17.9°C | 147 | 17.4 | 12.212 h |
| April | 24.7°C16.4°C | 16.4°C | 49 | 8.7 | 11.612 h |
| May | 22.7°C13.7°C | 13.7°C | 31 | 5.3 | 11.111 h |
| June | 22.1°C12.3°C | 12.3°C | 15 | 2.5 | 10.911 h |
| July | 22.3°C11.9°C | 11.9°C | 10 | 1.9 | 11.011 h |
| August | 23.9°C12.8°C | 12.8°C | 17 | 2.8 | 11.411 h |
| September | 25.4°C14.7°C | 14.7°C | 60 | 7.3 | 12.012 h |
| October | 25.9°C16.4°C | 16.4°C | 100 | 12.5 | 12.613 h |
| November | 25.0°C17.0°C | 17.0°C | 186 | 18.9 | 13.113 h |
| December, selected | 25.8°C18.0°C | 18.0°C | 238 | 22.2 | 13.413 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
- Barbacena in DecemberBrazil · 52 kmHigh 24.0°C · Low 16.5°C · 306 mm rain
- Conselheiro Lafaiete in DecemberBrazil · 72 kmHigh 25.1°C · Low 17.4°C · 253 mm rain
- Lavras in DecemberBrazil · 77 kmHigh 26.0°C · Low 18.0°C · 227 mm rain
- Ouro Preto in DecemberBrazil · 114 kmHigh 24.0°C · Low 16.7°C · 340 mm rain
- Juiz de Fora in DecemberBrazil · 117 kmHigh 26.8°C · Low 18.8°C · 340 mm rain
- Três Corações in DecemberBrazil · 120 kmHigh 26.3°C · Low 18.2°C · 248 mm rain
- Água Rasa in DecemberBrazil · 122 kmHigh 25.2°C · Low 17.6°C · 287 mm rain
- Itaúna in DecemberBrazil · 122 kmHigh 26.5°C · Low 18.9°C · 261 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 São João del Rei) is explained once on the São João del Rei year overview and on the Sources, method and limits page.