WEATHER · CLIMATE NORMALS · 1991–2020
Medellín Climate — Averages by Month
What the weather in Medellín, COaverages across a standard 30-year period. Each month's figure is the 1991–2020 mean temperature and total rainfall from the ERA5 reanalysis — the long-run normal a place settles around, not a forecast for any particular day.
Month-by-month normals
| Month | Avg temperature | Avg rainfall |
|---|---|---|
| January | 17.0 °C | 143.9 mm |
| February | 17.2 °C | 177.9 mm |
| March | 17.3 °C | 275.8 mm |
| April | 17.4 °C | 344.2 mm |
| May | 17.4 °C | 346.2 mm · wettest |
| June | 17.3 °C | 216.7 mm |
| July | 17.3 °C | 179.5 mm |
| August | 17.6 °C · warmest | 186.7 mm |
| September | 17.3 °C | 255.7 mm |
| October | 17.0 °C | 316.5 mm |
| November | 16.9 °C · coldest | 303.1 mm |
| December | 17.0 °C | 203.0 mm |
How to read these numbers
These are reanalysis normals, not readings from a single weather station. They come from the ERA5 0.25° (~25 km) global reanalysis grid, sampled at the grid cell nearest Medellín — centred at 6.25°N, 75.50°W. A reanalysis blends observations with a physics model onto an even grid, so a coastal or mountain city's cell can read a little cooler, warmer, wetter or drier than the city centre itself. The month-to-month shape — when it's hot, when it rains — is what these normals capture best.
“Normal” means the 1991–2020 average, the current World Meteorological Organization standard period. A normal is what a place tends toward over decades — any single day, month or year can and will depart from it.