Rio de Janeiro Weather in December
Average highs run from 27°C on December 1 to 28°C on December 31, and lows from 22°C to 23°C. Normal precipitation for the month is 220 mm over about 22 wet days.
December day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 28°C
- Average low
- 23°C
- Precipitation
- 220 mm
- Record high
- 41°CDec 13, 1982
- Record low
- 11°CDec 3, 1974
- Daylight
- 13 h 26 min to 13 h 31 min
- Cloud cover
- 73%
- Humidity
- 84%
- Dew point
- 22°C
- Wind
- 11.9 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 27°C | 22°C | 36°C 1974 | 21°C 1978 | 67% |
| Dec 2 | 27°C | 22°C | 34°C 1976 | 19°C 2001 | 68% |
| Dec 3 | 27°C | 22°C | 38°C 1974 | 11°C 1974 | 68% |
| Dec 4 | 27°C | 22°C | 35°C 2020 | 20°C 2001 | 67% |
| Dec 5 | 27°C | 22°C | 34°C 2020 | 19°C 2005 | 66% |
| Dec 6 | 27°C | 22°C | 35°C 2003 | 20°C 2001 | 67% |
| Dec 7 | 27°C | 22°C | 38°C 1978 | 20°C 2016 | 67% |
| Dec 8 | 27°C | 22°C | 39°C 2023 | 19°C 2019 | 68% |
| Dec 9 | 27°C | 22°C | 36°C 2000 | 17°C 2018 | 68% |
| Dec 10 | 27°C | 22°C | 34°C 1975 | 19°C 2018 | 68% |
| Dec 11 | 27°C | 22°C | 35°C 2005 | 18°C 1976 | 68% |
| Dec 12 | 27°C | 22°C | 28°C 1978 | 20°C 1974 | 70% |
| Dec 13 | 28°C | 22°C | 41°C 1982 | 16°C 1982 | 69% |
| Dec 14 | 28°C | 22°C | 33°C 2001 | 20°C 2005 | 69% |
| Dec 15 | 28°C | 23°C | 36°C 2020 | 20°C 1977 | 70% |
| Dec 16 | 28°C | 23°C | 35°C 2021 | 16°C 1974 | 70% |
| Dec 17 | 28°C | 23°C | 40°C 2003 | 19°C 1977 | 71% |
| Dec 18 | 28°C | 23°C | 36°C 2005 | 21°C 1978 | 72% |
| Dec 19 | 28°C | 23°C | 35°C 2005 | 20°C 1978 | 72% |
| Dec 20 | 28°C | 23°C | 35°C 2001 | 20°C 1978 | 72% |
| Dec 21 | 28°C | 23°C | 37°C 2024 | 22°C 2021 | 72% |
| Dec 22 | 28°C | 23°C | 35°C 2020 | 22°C 2000 | 72% |
| Dec 23 | 28°C | 23°C | 35°C 2003 | 20°C 2004 | 72% |
| Dec 24 | 28°C | 23°C | 36°C 1975 | 20°C 1977 | 72% |
| Dec 25 | 28°C | 23°C | 37°C 2002 | 20°C 2021 | 73% |
| Dec 26 | 28°C | 23°C | 35°C 2023 | 20°C 1977 | 74% |
| Dec 27 | 28°C | 23°C | 38°C 1978 | 20°C 2005 | 74% |
| Dec 28 | 28°C | 23°C | 36°C 2000 | 19°C 1977 | 75% |
| Dec 29 | 28°C | 23°C | 34°C 1975 | 20°C 2005 | 76% |
| Dec 30 | 28°C | 23°C | 37°C 2023 | 20°C 1976 | 75% |
| Dec 31 | 28°C | 23°C | 31°C 2023 | 22°C 2023 | 74% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- December 1
- sunrise 4:59 AM, sunset 6:25 PM
- December 31
- sunrise 5:10 AM, sunset 6:41 PM
Other months
Sources
Records: NOAA GHCN-Daily, station BRM00083746, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.