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

Monthly weather forecast and climate
Grass Valley, CA

January, the same as December, is another fresh winter month in Grass Valley, California, with average temperature varying between 38.3°F (3.5°C) and 53.8°F (12.1°C). In Grass Valley, the average high-temperature in January is practically the same as in December - a still fresh 53.8°F (12.1°C). Weather in January »

The last month of the winter, February, is another cool month in Grass Valley, California, with average temperature fluctuating between 54.5°F (12.5°C) and 37.8°F (3.2°C). In February, the average high-temperature is almost the same as in January - a still fresh 54.5°F (12.5°C). Weather in February »

The first month of the spring, March, is a moderate month in Grass Valley, California, with average temperature fluctuating between 39.9°F (4.4°C) and 56.5°F (13.6°C). In Grass Valley, the average high-temperature is almost the same as in February - a mild 56.5°F (13.6°C). Weather in March »

April in Grass Valley, California, is an enjoyable spring month, with average temperature ranging between min 43.3°F (6.3°C) and max 63.1°F (17.3°C). In Grass Valley, the average high-temperature in April slightly increases, from a moderate 56.5°F (13.6°C) in March, to a comfortable 63.1°F (17.3°C). Weather in April »

May, the last month of the spring, in Grass Valley, is an agreeable month, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 48.4°F (9.1°C). In Grass Valley, California, the average high-temperature in May marginally rises, from an enjoyable 63.1°F (17.3°C) in April, to an agreeable 71.2°F (21.8°C). Weather in May »

June, the first month of the summer, in Grass Valley, is a moderately hot month, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 55.9°F (13.3°C). In Grass Valley, the average high-temperature rises, from a pleasant 71.2°F (21.8°C) in May, to a warm 82°F (27.8°C). Weather in June »

July is a hot summer month in Grass Valley, California, with average temperature fluctuating between 60.1°F (15.6°C) and 90.1°F (32.3°C). The warmest month is July, with an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 60.1°F (15.6°C). Weather in July »

August, the last month of the summer, in Grass Valley, is also a hot month, with temperature in the range of an average high of 89.2°F (31.8°C) and an average low of 59.2°F (15.1°C). In Grass Valley, the average high-temperature in August is practically the same as in July - a still hot 89.2°F (31.8°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Grass Valley, California, with average temperature varying between 56.5°F (13.6°C) and 83.8°F (28.8°C). In September, the average high-temperature marginally drops, from a hot 89.2°F (31.8°C) in August, to a warm 83.8°F (28.8°C). Weather in September »

October, the same as September, in Grass Valley, California, is another pleasant autumn month, with average temperature varying between 50.7°F (10.4°C) and 72°F (22.2°C). In October, the average high-temperature drops, from a moderately hot 83.8°F (28.8°C) in September, to a pleasant 72°F (22.2°C). Weather in October »

The last month of the autumn, November, is another mild month in Grass Valley, California, with temperature in the range of an average low of 42.8°F (6°C) and an average high of 59.5°F (15.3°C). In November, the average high-temperature decreases, from a pleasant 72°F (22.2°C) in October, to a mild 59.5°F (15.3°C). Weather in November »

The first month of the winter, December, is also a fresh month in Grass Valley, California, with average temperature fluctuating between 51.3°F (10.7°C) and 37.2°F (2.9°C). With an average high-temperature of 51.3°F (10.7°C) and an average low-temperature of 37.2°F (2.9°C), December is the coldest month. Weather in December »

How many days does it rain in Grass Valley?

In Grass Valley, California, during the entire year, the rain falls for 82 days and collects up to 33.11" (841mm) of precipitation.

When does it snow in Grass Valley?

January through May, November and December are months with snowfall.

How much does it snow in Grass Valley?

In Grass Valley, California, during the entire year, snow falls for 6.8 days, and aggregates up to 14.41" (366mm) of snow.

What is the month with the least sunshine in Grass Valley?

January has the least sunshine of the year in Grass Valley, California, with an average of 5.7h of sunshine.

What is the snowiest month in Grass Valley?

February is the month with the most snowfall. Snow falls for 2.2 days and accumulates 6.42" (163mm) of snow.

What is the most humid month in Grass Valley?

With an average relative humidity of 75%, March is the most humid month in Grass Valley, California.

What is the rainiest month in Grass Valley?

The month with the most rainfall in Grass Valley, California, is March when the rain falls for 15.1 days and typically aggregates up to 6.57" (167mm) of precipitation.

When it does not snow in Grass Valley?

June through October are months without snowfall in Grass Valley.

When are the longest days in Grass Valley?

With an average of 14.9h of daylight, June has the longest days of the year in Grass Valley.

What is the warmest month in Grass Valley?

The warmest month in Grass Valley is July, with an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 60.1°F (15.6°C).

What is the least humid month in Grass Valley?

July is the least humid month, with an average relative humidity of 37%.

What is the driest month in Grass Valley?

Months with the least rainfall are July and August Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Grass Valley?

With an average of 12.2h of sunshine, July has the most sunshine of the year in Grass Valley.

When is the highest UV index in Grass Valley?

The month with the highest UV index is July, with an average maximum UV index of 7.

When is the lowest UV index in Grass Valley?

With an average maximum UV index of 2, November is the month with the lowest UV index in Grass Valley.

What is the coldest month in Grass Valley?

The coldest month is December, with an average high-temperature of 51.3°F (10.7°C) and an average low-temperature of 37.2°F (2.9°C).

What is the month with the shortest days in Grass Valley?

With an average of 9.5h of daylight, December has the shortest days of the year.
Average temperature - Grass Valley, CA
Average rainfall - Grass Valley, CA

The wettest month (with the highest rainfall) is March (6.57").
Driest months (with the lowest rainfall) are July and August (0.04").

Average rainfall days - Grass Valley, CA

The month with the highest number of rainy days is March (15.1 days).
The month with the lowest number of rainy days is July (1.1 days).

Average snowfall - Grass Valley, CA

The month with the highest snowfall is February (6.42").
Months with the lowest snowfall are June, July, August, September and October (0").

Average snowfall days - Grass Valley, CA

The month with the highest number of snowfall days is March (2.4 days).
Months with the lowest number of snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine - Grass Valley, CA