Climate almanac
Grass Valley
California, United States · 39.22°, -121.06°
What is the weather like in Grass Valley in August?
In August, Grass Valley is typically 91°F (33°C) during the day and 62°F (17°C) at night. The month brings about 0.2 in (5 mm) of precipitation in total.
- Average high91°F (33°C)
- Average low62°F (17°C)
- Precipitation0.2 in (5 mm)
- Clear or mostly clear days28
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)