January weather forecast and climate
Opal Cliffs, CA

Weather in January

January, like December, is another mild winter month in Opal Cliffs, California, with average temperature varying between 46.9°F (8.3°C) and 58.6°F (14.8°C).

Temperature

In Opal Cliffs, the average high-temperature is almost the same as in December - a still moderate 58.6°F (14.8°C). In Opal Cliffs, in January, the average low-temperature is 46.9°F (8.3°C).

Humidity

In Opal Cliffs, the average relative humidity in January is 72%.

Rainfall

In January, the rain falls for 9.3 days. Throughout January, 2.56" (65mm) of precipitation is accumulated. Throughout the year, there are 77.9 rainfall days, and 14.45" (367mm) of precipitation is accumulated.

Ocean temperature

In Opal Cliffs, in January, the average water temperature is 54.1°F (12.3°C).
Note: Swimming in 54.1°F (12.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In January, the average length of the day in Opal Cliffs is 10h.

Sunshine

In Opal Cliffs, the average sunshine in January is 6.1h.

UV index

In Opal Cliffs, California, the average daily maximum UV index in January is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in January in Opal Cliffs?

In Opal Cliffs, California, in January, the average high-temperature is 58.6°F (14.8°C), and the average low-temperature is 46.9°F (8.3°C).

What is the average humidity in January in Opal Cliffs?

The average relative humidity in January in Opal Cliffs is 72%.

How many days does it rain in January in Opal Cliffs?

In Opal Cliffs, California, during January, the rain falls for 9.3 days and regularly aggregates up to 2.56" (65mm) of precipitation.

How cold is the water in January in Opal Cliffs?

In Opal Cliffs, in January, the average water temperature is 54.1°F (12.3°C). Swimming in 54.1°F (12.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Opal Cliffs?

In Opal Cliffs, California, the average length of the day in January is 10h.

How long on average sun shines in January in Opal Cliffs?

The average sunshine in January in Opal Cliffs, California, is 6.1h.

How high is the UV index in January in Opal Cliffs?

The average daily maximum UV index in January in Opal Cliffs is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in January
Opal Cliffs, CA

Average temperature in January - Opal Cliffs, CA
  • Average high temperature in January: 58.6°F

The warmest months (with the highest average high temperature) are August and September (73°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in January: 46.9°F

The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).

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Average pressure in January
Opal Cliffs, CA

Average pressure in January - Opal Cliffs, CA
  • Average pressure in January: 30.13"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

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Average wind speed in January
Opal Cliffs, CA

Average wind speed in January - Opal Cliffs, CA
  • Average wind speed in January: 5.7mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in January
Opal Cliffs, CA

Average humidity in January - Opal Cliffs, CA
  • Average humidity in January: 72%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in January
Opal Cliffs, CA

Average rainfall in January - Opal Cliffs, CA
  • Average rainfall in January: 2.56"

The wettest month (with the highest rainfall) is December (2.8").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in January
Opal Cliffs, CA

Average rainfall days in January - Opal Cliffs, CA
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.2 days).

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Average sea temperature in January
Opal Cliffs, CA

Average sea temperature in January - Opal Cliffs, CA
  • Average sea temperature in January: 54.1°F

The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).

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Average daylight in January /
Average sunshine in January
Opal Cliffs, CA

Average daylight in January / Average sunshine in January - Opal Cliffs, CA
  • Average daylight in January: 10h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in January: 6.1h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in January
Opal Cliffs, CA

Average sunshine days in January - Opal Cliffs, CA
  • Average sunshine days in January: 20.5 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.4 days).

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Average UV index in January
Opal Cliffs, CA

Average UV index in January - Opal Cliffs, CA
  • Average UV index in January: 4

Months with the highest UV index are June, July, August and September (UV index 5).
Months with the lowest UV index are February and November (UV index 3).

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Average cloud cover in January
Opal Cliffs, CA

Average cloud cover in January - Opal Cliffs, CA
  • Average cloud cover in January: 33

The month with the most cloud cover is March (Cloud cover 38).
Months with the least cloud cover are July and September (Cloud cover 15).

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Average visibility in January
Opal Cliffs, CA

Average visibility in January - Opal Cliffs, 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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