WEATHER · CLIMATE NORMALS · 1991–2020
Bengaluru Climate — Averages by Month
What the weather in Bengaluru, INaverages 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 | 21.6 °C | 4.4 mm |
| February | 23.7 °C | 7.1 mm |
| March | 26.3 °C | 16.0 mm |
| April | 27.2 °C · warmest | 46.5 mm |
| May | 26.3 °C | 128.4 mm |
| June | 24.3 °C | 128.6 mm |
| July | 23.4 °C | 139.2 mm |
| August | 23.1 °C | 132.6 mm |
| September | 23.3 °C | 130.1 mm |
| October | 23.0 °C | 146.6 mm · wettest |
| November | 22.0 °C | 66.2 mm |
| December | 20.9 °C · coldest | 24.8 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 Bengaluru — centred at 13.00°N, 77.50°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.