Climate averages 1991–2020
Araruama weather
in December.
A warm, very wet month: the 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 Araruama: daytime highs average 26.6°C and nights cool to about 22.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 189 mm of rain on roughly 17 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average December day.
The nearest other city in this atlas is Saquarema (13 km away). In December its highs average 27.4°C, 0.7°C warmer than Araruama, with 122 mm of rain.
Among the 448 cities listed in Brazil, Araruama ranks joint 350th of 448 for the warmest December highs and joint 229th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Araruama is 1.9°C cooler than that mean.
From December to January, average highs rise by 0.9°C to 27.5°C, and monthly rainfall falls from 189 mm to 178 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
Araruama climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.5°C23.6°C | 23.6°C | 178 | 15.5 | 13.413 h |
| February | 28.0°C23.9°C | 23.9°C | 128 | 11.7 | 12.913 h |
| March | 27.2°C23.6°C | 23.6°C | 162 | 16.1 | 12.212 h |
| April | 26.1°C22.5°C | 22.5°C | 85 | 11.6 | 11.612 h |
| May | 24.2°C20.5°C | 20.5°C | 73 | 10.7 | 11.011 h |
| June | 23.6°C19.5°C | 19.5°C | 43 | 6.9 | 10.811 h |
| July | 23.2°C18.9°C | 18.9°C | 45 | 7.6 | 10.911 h |
| August | 23.4°C19.1°C | 19.1°C | 42 | 7.2 | 11.311 h |
| September | 23.9°C19.7°C | 19.7°C | 74 | 9.9 | 11.912 h |
| October | 24.6°C20.7°C | 20.7°C | 94 | 11.1 | 12.613 h |
| November | 25.2°C21.5°C | 21.5°C | 172 | 15.9 | 13.213 h |
| December, selected | 26.6°C22.9°C | 22.9°C | 189 | 16.8 | 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
December in nearby cities
- Saquarema in DecemberBrazil · 13 kmHigh 27.4°C · Low 22.7°C · 122 mm rain
- São Pedro da Aldeia in DecemberBrazil · 25 kmHigh 26.5°C · Low 22.7°C · 142 mm rain
- Cabo Frio in DecemberBrazil · 32 kmHigh 26.5°C · Low 22.9°C · 96 mm rain
- Maricá in DecemberBrazil · 49 kmHigh 29.0°C · Low 23.0°C · 123 mm rain
- Itaboraí in DecemberBrazil · 55 kmHigh 28.7°C · Low 21.6°C · 255 mm rain
- Rio das Ostras in DecemberBrazil · 56 kmHigh 28.4°C · Low 22.4°C · 222 mm rain
- Nova Friburgo in DecemberBrazil · 68 kmHigh 26.2°C · Low 19.1°C · 352 mm rain
- São Gonçalo in DecemberBrazil · 73 kmHigh 29.1°C · Low 22.1°C · 229 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 Araruama) is explained once on the Araruama year overview and on the Sources, method and limits page.