January weather forecast and climate
Graton, CA

Weather in January

January, like December, is a moderate winter month in Graton, California, with average temperature varying between 43.2°F (6.2°C) and 57.2°F (14°C).

Temperature

In Graton, the average high-temperature is relatively the same as in December - a still mild 57.2°F (14°C). In Graton, California, the average low-temperature is 43.2°F (6.2°C).

Humidity

In Graton, the average relative humidity is 75%.

Rainfall

In January, in Graton, the rain falls for 10 days. Throughout January, 2.01" (51mm) of precipitation is accumulated. In Graton, during the entire year, the rain falls for 72.8 days and collects up to 12.01" (305mm) of precipitation.

Daylight

In January, the average length of the day in Graton is 9.9h.

Sunshine

In Graton, the average sunshine is 5.8h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Graton, California. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in January in Graton?

The average high-temperature, in January, in Graton, California, is 57.2°F (14°C), while the average low-temperature is 43.2°F (6.2°C).

What is the average humidity in January in Graton?

The average relative humidity in January in Graton is 75%.

How many days does it rain in January in Graton?

In Graton, California, in January, during 10 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.

What is the average length of the day in January in Graton?

In January, the average length of the day in Graton is 9.9h.

How many hours of sunshine does Graton have in January?

In January, the average sunshine in Graton, California, is 5.8h.

What are the months with 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 UV index intensity in January in Graton?

In Graton, California, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in January
Graton, CA

Average temperature in January - Graton, CA
  • Average high temperature in January: 57.2°F

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).

  • Average low temperature in January: 43.2°F

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).

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Average pressure in January
Graton, CA

Average pressure in January - Graton, CA
  • Average pressure in January: 30.13"

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

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Average wind speed in January
Graton, CA

Average wind speed in January - Graton, CA
  • Average wind speed in January: 5.2mph

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).

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Average humidity in January
Graton, CA

Average humidity in January - Graton, CA
  • Average humidity in January: 75%

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

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Average rainfall in January
Graton, CA

Average rainfall in January - Graton, CA
  • Average rainfall in January: 2.01"

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

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Average rainfall days in January
Graton, CA

Average rainfall days in January - Graton, CA
  • Average rainfall days in January: 10 days

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).

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Average daylight in January /
Average sunshine in January
Graton, CA

Average daylight in January / Average sunshine in January - Graton, CA
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in January: 5.8h

The month with the most sunshine is July (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in January
Graton, CA

Average sunshine days in January - Graton, CA
  • Average sunshine days in January: 19.9 days

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

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Average UV index in January
Graton, CA

Average UV index in January - Graton, CA
  • Average UV index in January: 3

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

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Average cloud cover in January
Graton, CA

Average cloud cover in January - Graton, CA
  • Average cloud cover in January: 36

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in January
Graton, CA

Average visibility in January - Graton, CA
  • Average visibility in January: 6mi

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

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