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Grass Valley climate
Typical historical weather for Grass Valley, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for Grass Valley.
Annual average
14.9°C
across all months
Warmest month
33.4°C
Jul average high
Coolest month
2.9°C
Dec average low
Annual rainfall
1578mm
total per year
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
● Avg high● Avg low▮ Rainfall
Records on file
Hottest day
42.3°C
6 September 2022
Coldest day
-7.4°C
23 February 2018
Wettest day
184.3mm
24 October 2021
Windiest day
7.3m/s
25 December 2025
See the detail: Grass Valley on 24 October 2021.