WEATHER · CLIMATE NORMALS · 1991–2020
Miami Climate — Averages by Month
What the weather in Miami, USaverages 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 | 20.5 °C · coldest | 52.4 mm |
| February | 21.3 °C | 43.2 mm |
| March | 22.3 °C | 52.3 mm |
| April | 24.0 °C | 58.3 mm |
| May | 25.7 °C | 98.8 mm |
| June | 27.2 °C | 164.5 mm |
| July | 27.9 °C | 122.5 mm |
| August | 28.0 °C · warmest | 155.1 mm |
| September | 27.4 °C | 167.5 mm · wettest |
| October | 26.0 °C | 125.0 mm |
| November | 23.6 °C | 61.2 mm |
| December | 21.8 °C | 46.1 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 Miami — centred at 25.75°N, 80.25°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.