WEATHER · CLIMATE NORMALS · 1991–2020
Amman Climate — Averages by Month
What the weather in Amman, JOaverages 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 | 8.0 °C · coldest | 46.1 mm · wettest |
| February | 9.3 °C | 44.0 mm |
| March | 12.7 °C | 29.9 mm |
| April | 17.1 °C | 12.2 mm |
| May | 21.6 °C | 5.1 mm |
| June | 24.5 °C | 0.4 mm |
| July | 26.3 °C · warmest | 0.1 mm |
| August | 26.3 °C | 0.2 mm |
| September | 24.4 °C | 1.3 mm |
| October | 20.7 °C | 7.2 mm |
| November | 14.5 °C | 18.4 mm |
| December | 9.7 °C | 29.9 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 Amman — centred at 32.00°N, 36.00°E. 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.