January weather forecast
Clearlake, CA

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A long footbridge over the marina in Clearlake, California
A long footbridge over the marina in Clearlake, California

Weather in January

January, like December, in Clearlake, California, is another fresh winter month, with an average temperature fluctuating between 39°F (3.9°C) and 54.7°F (12.6°C).

Temperature

January's advent notes a subtle adjustment in average high-temperature to a still cool 54.7°F (12.6°C) from December. Clearlake records an average low-temperature of 39°F (3.9°C) throughout the month of January.

Humidity

The average relative humidity in January is 72%.

Rainfall

In January, in Clearlake, the rain falls for 10.3 days. Throughout January, 3.35" (85mm) of precipitation is accumulated. In Clearlake, during the entire year, the rain falls for 79.8 days and collects up to 17.44" (443mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Clearlake. In Clearlake, during January, snow falls for 0.2 days and regularly aggregates up to 0.28" (7mm) of snow. In Clearlake, during the entire year, snow falls for 1.8 days and aggregates up to 0.98" (25mm) of snow.

Daylight

The average length of the day in January in Clearlake is 9h and 49min.
On the first day of the month, sunrise is at 7:29 am and sunset at 4:58 pm. On the last day of January, in Clearlake, sunrise is at 7:17 am and sunset at 5:30 pm PST.

Sunshine

In Clearlake, the average sunshine in January is 5.5h.

UV index

The average daily maximum UV index in January in Clearlake is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 3 during January translates into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What is the average January temperature in Clearlake?

In Clearlake, 54.7°F (12.6°C) is the average high-temperature and 39°F (3.9°C) is the average low-temperature during January.

What is the average humidity in January in Clearlake?

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

How much does it rain in Clearlake in January?

In Clearlake, in January, it is raining for 10.3 days, with typically 3.35" (85mm) of accumulated precipitation.

How much does it snow in Clearlake in January?

In Clearlake, California, in January, snow falls for 0.2 days, with typically accumulated 0.28" (7mm) of snow.

How many hours of daylight does Clearlake have in January?

The average day length in January in Clearlake is 9h and 49min.

What time are sunrise and sunset in January in Clearlake?

In January, on the first day of the month, sunrise is at 7:29 am and sunset at 4:58 pm. On the last day of the month, in Clearlake, California, sunrise is at 7:17 am and sunset at 5:30 pm PST.

How long on average sun shines in January in Clearlake?

In Clearlake, the average sunshine duration in January is 5.5h.

What is the UV index intensity in January in Clearlake?

The average daily maximum UV index in January in Clearlake, California, is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Clearlake, CA

Average temperature in January - Clearlake, CA
  • Average high temperature in January: 54.7°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in January: 39°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).

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Average pressure in January
Clearlake, CA

Average pressure in January - Clearlake, CA
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in January
Clearlake, CA

Average wind speed in January - Clearlake, CA
  • Average wind speed in January: 4.7mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in January
Clearlake, CA

Average humidity in January - Clearlake, CA
  • Average humidity in January: 72%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (44%).

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Average rainfall in January
Clearlake, CA

Average rainfall in January - Clearlake, CA
  • Average rainfall in January: 3.35"

The wettest month (with the highest rainfall) is February (3.7").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in January
Clearlake, CA

Average rainfall days in January - Clearlake, CA
  • Average rainfall days in January: 10.3 days

The month with the highest number of rainy days is March (13.9 days).
The months with the least rainy days are July and August (1.1 days).

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Average snowfall in January
Clearlake, CA

Average snowfall in January - Clearlake, CA
  • Average snowfall in January: 0.28"

The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in January
Clearlake, CA

Average snowfall days in January - Clearlake, CA
  • Average snowfall days in January: 0.2 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in January / Average sunshine in January - Clearlake, CA
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 5h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in January
Clearlake, CA

Average sunshine days in January - Clearlake, CA
  • Average sunshine days in January: 19.6 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).

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Average UV index in January
Clearlake, CA

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

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in January
Clearlake, CA

Average cloud cover in January - Clearlake, CA
  • Average cloud cover in January: 40

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in January
Clearlake, CA

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

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).

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Clearlake, California, USA

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