Grass Valley
California, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Grass Valley, CA

  • Average high temperature in January: 11.9°C

The warmest month (with the highest average high temperature) is July (30.8°C).
The month with the lowest average high temperature is December (11.7°C).

  • Average low temperature in January: 0°C

The month with the highest average low temperature is July (13.4°C).
The coldest month (with the lowest average low temperature) is December (-0.2°C).

  • Average rainfall in January: 246.1mm

The wettest month (with the highest rainfall) is January (246.1mm).
The driest month (with the lowest rainfall) is July (3mm).

  • Average rainfall days in January: 13.1 days

The month with the highest number of rainy days is January (13.1 days).
The month with the lowest number of rainy days is July (0.2 days).

  • Average snowfall in January: 55.9mm

The month with the highest snowfall is February (63.5mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

  • Average snowfall days in January: 0.4 days

The month with the highest number of snowfall days is March (1.1 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

  • Average daylight in January: 9.8h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.5h).

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