Sacramento weather by month
Sacramento runs from about 9°C in January to 28°C in July, with February the wettest month at 209 mm.
warmest month
July
28°C
coolest month
January
9°C
wettest month
February
209 mm
worst air month
December
20 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 9°C | 134 mm | 164 h | 14 |
| February | 10°C | 209 mm | 222 h | 12 |
| March | 12°C | 85 mm | 280 h | 11 |
| April | 15°C | 42 mm | 333 h | 7 |
| May | 20°C | 23 mm | 420 h | 8 |
| June | 25°C | 0 mm | 414 h | 8 |
| July | 28°C | 0 mm | 431 h | 9 |
| August | 25°C | 9 mm | 396 h | 8 |
| September | 24°C | 0 mm | 347 h | 9 |
| October | 21°C | 12 mm | 319 h | 11 |
| November | 11°C | 186 mm | 230 h | 16 |
| December | 9°C | 108 mm | 175 h | 20 |
About 3,731 hours of sun a year. Roughly 81 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.