Grass Valley Weather Forecast
- 59
- 87
Sunny
- 53
- 78
Mostly Sunny
- 54
- 77
Mostly Sunny
- 56
- 79
Mostly Sunny
- 55
- 79
Mostly Sunny
- 54
- 78
Sunny
Today 20 Jul Motherlode
Sunny. Highs 85 to 95. Light Winds becoming southwest up to 10 Mph in the afternoon.
Tonight 20 Jul Motherlode
Clear. Lows 55 to 65. Prevailing southwest Winds up to 10 Mph in the evening becoming light.
Grass Valley Temperature Statistics
July Temperature
Nevada County Air Park (3.1 miles)
Lowest 4 July, 2025
60.8 °FAverage July
77.2 °FHighest 11 July, 2025
91.4 °F
Climate (2020–Present)
Nevada County Air Park (3.1 miles)
Average Low 2020–2025
52.1 °FAverage 2020–2025
60.6 °FAverage High 2020–2025
68.9 °F