Climate and monthly weather forecast
Graton, CA

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Weather in January

January, the same as December, in Graton, California, is another mild winter month, with an average temperature ranging between min 43.2°F (6.2°C) and max 57.2°F (14°C). The initiation of January records an average high-temperature of a still mild 57.2°F (14°C), displaying a near consistency with the previous month. Weather in January »

Weather in February

February, the last month of the winter in Graton, is another refreshing month, with an average temperature fluctuating between 42.8°F (6°C) and 58.8°F (14.9°C). February notes an average high-temperature of a still moderate 58.8°F (14.9°C), subtly differing from January's 57.2°F (14°C). Weather in February »

Weather in March

The first month of the spring, March, is still a mild month in Graton, California, with an average temperature ranging between max 60.4°F (15.8°C) and min 43.5°F (6.4°C). March's advent denotes a minor fluctuation in the average high-temperature to a still refreshing 60.4°F (15.8°C) from February's 58.8°F (14.9°C). Weather in March »

Weather in April

April in Graton, California, is a comfortable spring month, with temperature in the range of an average low of 45.5°F (7.5°C) and an average high of 64.9°F (18.3°C). Graton, California, records an average high-temperature of a comfortable 64.9°F (18.3°C) as April arrives, nearly mirroring the previous month's climate. Weather in April »

Weather in May

May, the last month of the spring in Graton, is an agreeable month, with an average temperature fluctuating between 69.1°F (20.6°C) and 48.6°F (9.2°C). May's average high-temperature stands at an agreeable 69.1°F (20.6°C), showing little deviation from April's 64.9°F (18.3°C). Weather in May »

Weather in June

June, the first month of the summer in Graton, is a moderately hot month, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 53.1°F (11.7°C). June's onset witnesses a minor shift in the average high-temperature, moving from a pleasant 69.1°F (20.6°C) in May to a moderately hot 76.3°F (24.6°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Graton, California, with an average temperature fluctuating between 54.1°F (12.3°C) and 79.3°F (26.3°C). The advent of July sees the average high-temperature at a still moderately hot 79.3°F (26.3°C), subtly shifted from June's 76.3°F (24.6°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Graton, California, with an average temperature varying between 79.7°F (26.5°C) and 54.7°F (12.6°C). Graton's temperatures peak on average in August, reaching 79.7°F (26.5°C) at their highest and 54.7°F (12.6°C) at their lowest. Weather in August »

Weather in September

September, the first month of the autumn in Graton, is also a moderately hot month, with an average temperature varying between 79°F (26.1°C) and 54.7°F (12.6°C). With September's arrival, Graton's weather records an average high-temperature of a still warm 79°F (26.1°C), marking little difference from August's 79.7°F (26.5°C). Weather in September »

Weather in October

October, the same as September, in Graton, California, is an agreeable autumn month, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 51.8°F (11°C). October's onset introduces a mild reduction in the average high-temperature, from a warm 79°F (26.1°C) in September to an agreeable 72.3°F (22.4°C). Weather in October »

Weather in November

November, the last month of the autumn in Graton, is another refreshing month, with an average temperature fluctuating between 63.1°F (17.3°C) and 46°F (7.8°C). The arrival of November corresponds with a temperature reduction, down from October's agreeable 72.3°F (22.4°C) to an enjoyable 63.1°F (17.3°C). Weather in November »

Weather in December

December, the first month of the winter in Graton, is still a mild month, with temperature in the range of an average low of 41.9°F (5.5°C) and an average high of 55.6°F (13.1°C). Temperature records mark December as the coldest month, with highs averaging 55.6°F (13.1°C) and lows at 41.9°F (5.5°C). Weather in December »
Updated: Feb 9, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How much does it rain in Graton?

Throughout the year, there are 72.8 rainfall days, and 12.01" (305mm) of precipitation is accumulated.

When is the lowest UV index in Graton?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Graton.

What is the rainiest month in Graton?

The month with the most rainfall is February, when the rain falls for 9.1 days and typically aggregates up to 2.64" (67mm) of precipitation.

What is the most humid month in Graton?

With an average relative humidity of 77%, March is the most humid month in Graton.

When is Daylight Saving Time (DST) in Graton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Graton, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Graton?

The month with the longest days in Graton is June, with an average of 14h and 48min of daylight.

When is the highest UV index in Graton?

With an average maximum UV index of 6, June is the month with the highest UV index in Graton, California.

What is the driest month in Graton?

The months with the least rainfall in Graton, California, are July and August Rain falls for 1.5 days and accumulates 0.04" (1mm) of rain.

What month has the most sunshine in Graton?

With an average of 11.9h of sunshine, July has the most sunshine of the year in Graton, California.

What time of the year is the hottest in Graton?

With average high temperatures of 79.7°F (26.5°C) and lows of 54.7°F (12.6°C), August is the warmest month.

What is the least humid month in Graton?

September is the least humid month in Graton, with an average relative humidity of 63%.

What is the coldest month in Graton?

Temperature readings reach their annual highs in December, averaging 55.6°F (13.1°C) and a minimum average of 41.9°F (5.5°C).

What is the month with the shortest days in Graton?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

What is the month with the least sunshine in Graton?

The month with the least sunshine is December, with an average of 5.7h of sunshine.

Average temperature
Graton, CA

Average temperature - Graton, CA

The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (55.6°F).

The months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

Average pressure
Graton, CA

Average pressure - Graton, CA

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

Average wind speed
Graton, CA

Average wind speed - Graton, CA

The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

Average humidity
Graton, CA

Average humidity - Graton, CA

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (63%).

Average rainfall
Graton, CA

Average rainfall - Graton, CA

The wettest month (with the highest rainfall) is February (2.64").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days
Graton, CA

Average rainfall days - Graton, CA

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).

Average daylight / Average sunshine
Graton, CA

Average daylight / Average sunshine - Graton, CA

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days
Graton, CA

Average sunshine days - Graton, CA

The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (17.1 days).

Average UV index
Graton, CA

Average UV index - Graton, CA

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average visibility
Graton, CA

Average visibility - Graton, CA

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Graton, California, USA

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