Climate averages 1991–2020
Santa Rosa, Brazil weather
in December.
A hot, wet month: the 2nd 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 Santa Rosa, Brazil: daytime highs average 29.5°C and nights cool to about 20.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 160 mm of rain on roughly 13 days, which makes December a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 52 min on an average December day.
The nearest other city in this atlas is Santo Ângelo (52 km away). In December its highs average 29.2°C, about as warm as Santa Rosa, Brazil, with 178 mm of rain.
Among the 448 cities listed in Brazil, Santa Rosa, Brazil ranks joint 137th of 448 for the warmest December highs and joint 156th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Santa Rosa, Brazil is 1.1°C warmer than that mean.
From December to January, average highs rise by 0.3°C to 29.9°C, and monthly rainfall falls from 160 mm to 143 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
Santa Rosa, Brazil climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.9°C21.2°C | 21.2°C | 143 | 14.3 | 13.714 h |
| February | 29.0°C20.7°C | 20.7°C | 137 | 14.1 | 13.113 h |
| March | 28.1°C19.5°C | 19.5°C | 127 | 11.7 | 12.312 h |
| April | 25.4°C16.8°C | 16.8°C | 155 | 9.6 | 11.411 h |
| May | 21.5°C13.4°C | 13.4°C | 152 | 9.3 | 10.811 h |
| June | 19.8°C11.9°C | 11.9°C | 143 | 9.4 | 10.410 h |
| July | 19.2°C10.7°C | 10.7°C | 137 | 9.4 | 10.611 h |
| August | 21.7°C12.2°C | 12.2°C | 94 | 8.5 | 11.111 h |
| September | 23.4°C13.8°C | 13.8°C | 152 | 10.3 | 11.912 h |
| October | 25.7°C16.4°C | 16.4°C | 214 | 12.9 | 12.713 h |
| November | 27.5°C17.7°C | 17.7°C | 156 | 11.0 | 13.513 h |
| December, selected | 29.5°C20.1°C | 20.1°C | 160 | 13.1 | 13.914 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
- Santo Ângelo in DecemberBrazil · 52 kmHigh 29.2°C · Low 19.4°C · 178 mm rain
- Ijuí in DecemberBrazil · 80 kmHigh 28.8°C · Low 19.0°C · 178 mm rain
- Encarnación in DecemberParaguay · 149 kmHigh 30.4°C · Low 21.4°C · 174 mm rain
- Posadas in DecemberArgentina · 152 kmHigh 30.3°C · Low 21.5°C · 163 mm rain
- Chapecó in DecemberBrazil · 203 kmHigh 26.9°C · Low 17.6°C · 189 mm rain
- Passo Fundo in DecemberBrazil · 208 kmHigh 26.0°C · Low 16.9°C · 178 mm rain
- Santa Maria in DecemberBrazil · 212 kmHigh 28.6°C · Low 18.2°C · 158 mm rain
- Erechim in DecemberBrazil · 219 kmHigh 25.9°C · Low 16.7°C · 185 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 Santa Rosa) is explained once on the Santa Rosa, Brazil year overview and on the Sources, method and limits page.