Climate averages 1991–2020
Rionegro weather
in December.
A mild, very wet month: the 11th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Rionegro: daytime highs average 20.8°C and nights cool to about 13.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 220 mm of rain on roughly 24 days, which makes December a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 46 min on an average December day.
The nearest other city in this atlas is Medellín (24 km away). In December its highs average 23.6°C, 2.8°C warmer than Rionegro, with 193 mm of rain.
Among the 46 cities listed in Colombia, Rionegro ranks 38th of 46 for the warmest December highs and 36th of 46 for the driest December (rainfall, lowest first). The mean December high of those 46 cities is 25.7°C; Rionegro is 4.9°C cooler than that mean.
From December to January, average highs rise by 0.3°C to 21.1°C, and monthly rainfall falls from 220 mm to 141 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
Rionegro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.1°C12.9°C | 12.9°C | 141 | 21.3 | 11.812 h |
| February | 21.4°C13.0°C | 13.0°C | 159 | 22.5 | 11.912 h |
| March | 21.7°C13.2°C | 13.2°C | 267 | 27.1 | 12.112 h |
| April | 21.5°C13.5°C | 13.5°C | 319 | 26.0 | 12.312 h |
| May | 21.6°C13.6°C | 13.6°C | 272 | 24.9 | 12.412 h |
| June | 21.9°C13.1°C | 13.1°C | 105 | 17.3 | 12.512 h |
| July | 22.4°C12.7°C | 12.7°C | 69 | 12.2 | 12.412 h |
| August | 23.1°C12.9°C | 12.9°C | 89 | 13.9 | 12.312 h |
| September | 22.3°C13.0°C | 13.0°C | 176 | 21.4 | 12.212 h |
| October | 21.1°C13.1°C | 13.1°C | 332 | 27.7 | 12.012 h |
| November | 20.5°C13.2°C | 13.2°C | 369 | 28.5 | 11.812 h |
| December, selected | 20.8°C13.1°C | 13.1°C | 220 | 23.8 | 11.812 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
- Medellín in DecemberColombia · 24 kmHigh 23.6°C · Low 15.1°C · 193 mm rain
- Bello in DecemberColombia · 29 kmHigh 24.1°C · Low 15.4°C · 193 mm rain
- Caldas in DecemberColombia · 30 kmHigh 22.0°C · Low 13.4°C · 169 mm rain
- La Dorada in DecemberColombia · 111 kmHigh 30.5°C · Low 21.9°C · 116 mm rain
- Quibdó in DecemberColombia · 151 kmHigh 27.8°C · Low 22.6°C · 610 mm rain
- Ibagué in DecemberColombia · 192 kmHigh 24.9°C · Low 17.8°C · 142 mm rain
- Barrancabermeja in DecemberColombia · 196 kmHigh 29.1°C · Low 23.0°C · 245 mm rain
- Zipaquirá in DecemberColombia · 197 kmHigh 19.0°C · Low 9.9°C · 90 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 Rionegro) is explained once on the Rionegro year overview and on the Sources, method and limits page.