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

January weather forecast and climate
Grass Valley, CA

January, like December, in Grass Valley, California, is another fresh winter month, with average temperature fluctuating between 53.4°F (11.9°C) and 32°F (0°C).

Temperature

In Grass Valley, the average high-temperature is essentially the same as in December - a still cool 53.4°F (11.9°C). In January, the average low-temperature is 32°F (0°C).

Rainfall

January is the month with the most rainfall in Grass Valley. Rain falls for 13.1 days and accumulates 9.7" (246.1mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In January, it is snowing for 0.4 days. Throughout January, 2.2" (55.9mm) of snow is accumulated. In Grass Valley, during the entire year, snow falls for 3.4 days, and aggregates up to 10.1" (256.6mm) of snow.

Daylight

The average length of the day in January in Grass Valley, California, is 9.8h.

What is the temperature in January in Grass Valley?

In January, in Grass Valley, California, the average high-temperature is 53.4°F (11.9°C), and the average low-temperature is 32°F (0°C).

How much does it rain in Grass Valley in January?

In Grass Valley, in January, during 13.1 rainfall days, 9.7" (246.1mm) of precipitation is typically accumulated.

What is the wettest month in Grass Valley?

January is the month with the most rainfall. Rain falls for 13.1 days and accumulates 9.7" (246.1mm) of precipitation.

How many days does it snow in January in Grass Valley?

In January, in Grass Valley, it is snowing for 0.4 days. Throughout January, 2.2" (55.9mm) of snow is accumulated.

What is the average length of the day in January in Grass Valley?

The average length of the day in January is 9.8h.
Average temperature in January - Grass Valley, CA
  • Average high temperature in January: 53.5°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is December (53.1°F).

  • Average low temperature in January: 32°F

The month with the highest average low temperature is July (56.2°F).
The coldest month (with the lowest average low temperature) is December (31.7°F).

Average rainfall in January - Grass Valley, CA
  • Average rainfall in January: 9.7"

The wettest month (with the highest rainfall) is January (9.7").
The driest month (with the lowest rainfall) is July (0.1").

Average rainfall days in January - Grass Valley, CA
  • 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 - Grass Valley, CA
  • Average snowfall in January: 2.2"

The month with the highest snowfall is February (2.5").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in January - Grass Valley, CA
  • 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 - Grass Valley, CA
  • 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).