WEATHER · CLIMATE NORMALS · 1991–2020
Guangzhou Climate — Averages by Month
What the weather in Guangzhou, CNaverages 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 | 14.4 °C · coldest | 53.0 mm |
| February | 16.0 °C | 68.8 mm |
| March | 18.9 °C | 147.8 mm |
| April | 23.2 °C | 233.9 mm |
| May | 26.5 °C | 331.6 mm |
| June | 28.5 °C | 399.1 mm · wettest |
| July | 29.4 °C · warmest | 267.6 mm |
| August | 29.1 °C | 288.1 mm |
| September | 27.8 °C | 178.3 mm |
| October | 24.9 °C | 62.5 mm |
| November | 20.6 °C | 41.9 mm |
| December | 15.9 °C | 42.2 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 Guangzhou — centred at 23.25°N, 113.25°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.