WEATHER · CLIMATE NORMALS · 1991–2020
Baku Climate — Averages by Month
What the weather in Baku, AZaverages 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 | 5.9 °C | 31.0 mm |
| February | 5.5 °C · coldest | 31.5 mm |
| March | 7.6 °C | 27.0 mm |
| April | 11.4 °C | 24.1 mm |
| May | 17.2 °C | 15.3 mm |
| June | 22.6 °C | 7.1 mm |
| July | 25.8 °C | 6.9 mm |
| August | 26.2 °C · warmest | 6.6 mm |
| September | 22.3 °C | 23.5 mm |
| October | 17.4 °C | 37.8 mm |
| November | 11.8 °C | 47.1 mm · wettest |
| December | 7.9 °C | 37.4 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 Baku — centred at 40.50°N, 49.75°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.