WEATHER · CLIMATE NORMALS · 1991–2020
Carson City Climate — Averages by Month
What the weather in Carson City, 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 | 0.0 °C | 85.3 mm · wettest |
| February | 1.1 °C | 77.1 mm |
| March | 3.6 °C | 69.3 mm |
| April | 6.3 °C | 38.5 mm |
| May | 11.3 °C | 33.6 mm |
| June | 16.8 °C | 15.3 mm |
| July | 21.6 °C · warmest | 8.5 mm |
| August | 21.0 °C | 8.8 mm |
| September | 17.4 °C | 11.2 mm |
| October | 10.9 °C | 28.8 mm |
| November | 4.4 °C | 46.8 mm |
| December | -0.1 °C · coldest | 84.9 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 Carson City — centred at 39.25°N, 119.75°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.