Climate and monthly 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, the same as December, is a cool winter month in Clearlake, California, with an average temperature ranging between min 39°F (3.9°C) and max 54.7°F (12.6°C). In the transition from December to January, Clearlake reports an average high-temperature of a still fresh 54.7°F (12.6°C), indicating a close resemblance to the prior month. Weather in January »

Weather in February

February, the last month of the winter in Clearlake, is a refreshing month, with an average temperature varying between 38.7°F (3.7°C) and 56.3°F (13.5°C). At the onset of February, Clearlake records an average high-temperature of a moderate 56.3°F (13.5°C), showing little deviation from the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Clearlake, is still a mild month, with an average temperature fluctuating between 58.6°F (14.8°C) and 40.1°F (4.5°C). March brings an average high-temperature of a still moderate 58.6°F (14.8°C), nearly identical to the preceding month. Weather in March »

Weather in April

April is an enjoyable spring month in Clearlake, California, with an average temperature ranging between min 43.2°F (6.2°C) and max 66°F (18.9°C). The shift into April is marked by a modest rise in the average high-temperature, moving from March's moderate 58.6°F (14.8°C) to a comfortable 66°F (18.9°C). Weather in April »

Weather in May

May, the last month of the spring in Clearlake, is a moderately hot month, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 73.9°F (23.3°C). The commencement of May sees a minor shift in the average high-temperature, moving from a comfortable 66°F (18.9°C) in April to a warm 73.9°F (23.3°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Clearlake, California, with an average temperature varying between 83.8°F (28.8°C) and 55.4°F (13°C). The start of June brings a shift in the average high-temperature, increasing from May's 73.9°F (23.3°C) to a still moderately hot 83.8°F (28.8°C). Weather in June »

Weather in July

July in Clearlake, California, is a tropical summer month, with an average temperature fluctuating between 91.2°F (32.9°C) and 58.8°F (14.9°C). Clearlake witnesses the warmest weather in July, with temperatures averaging a high of 91.2°F (32.9°C) and a low of 58.8°F (14.9°C). The heat index value for July is estimated at a torrid 95°F (35°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Clearlake, California, with an average temperature varying between 58.3°F (14.6°C) and 90.1°F (32.3°C). Transitioning into August, Clearlake records an average high-temperature of a still tropical 90.1°F (32.3°C), almost identical to July's 91.2°F (32.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Clearlake, California, with an average temperature fluctuating between 85.1°F (29.5°C) and 55.8°F (13.2°C). Clearlake records a slight change with September's average high-temperatures adjusting to a warm 85.1°F (29.5°C) from August's 90.1°F (32.3°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Clearlake, California, with an average temperature varying between 49.6°F (9.8°C) and 73.8°F (23.2°C). The onset of October comes with a shift in the average high-temperature, falling from 85.1°F (29.5°C) in September to a still warm 73.8°F (23.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in Clearlake, California, with an average temperature fluctuating between 61°F (16.1°C) and 42.4°F (5.8°C). The beginning of November involves a decrease in the average high-temperature, transitioning from a warm 73.8°F (23.2°C) in October to a refreshing 61°F (16.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Clearlake, California, with an average temperature ranging between min 38.1°F (3.4°C) and max 52.7°F (11.5°C). December is Clearlake's coldest month, registering average high temperatures of 52.7°F (11.5°C) and lows of 38.1°F (3.4°C). Weather in December »

Frequently asked questions

How many days does it rain?

Throughout the year, in Clearlake, there are 79.8 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

When does it snow?

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

How much does it snow?

Throughout the year, there are 1.8 snowfall days, and 0.98" (25mm) of snow is accumulated.

What is the wettest month?

February is the month with the most rainfall. Rain falls for 9.3 days and accumulates 3.7" (94mm) of precipitation.

What is the snowiest month?

February is the month with the most snowfall. Snow falls for 0.9 days and accumulates 0.51" (13mm) of snow.

What is the most humid month?

March is the most humid month, with an average relative humidity of 74%.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 it does not snow?

In Clearlake, snow does not fall in April through October.

When are the longest days?

June has the longest days of the year, with an average of 14h and 54min of daylight.

What is the hottest time of year?

Clearlake witnesses the warmest weather in July, with temperatures averaging a high of 91.2°F (32.9°C) and a low of 58.8°F (14.9°C).

What is the least humid month?

The least humid month is July, with an average relative humidity of 44%.

What is the driest month?

The 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?

The month with the most sunshine in Clearlake is July, with an average of 12h of sunshine.

When is the highest UV index?

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

What is the month with the lowest UV index?

The months with the lowest UV index are November and December, with an average maximum UV index of 2.

What part of the year is the coldest?

During the coldest month in Clearlake, December, temperatures average a high of 52.7°F (11.5°C) and a low of 38.1°F (3.4°C).

What is the month with the shortest days?

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

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.3h of sunshine.

Average temperature
Clearlake, CA

Average temperature - Clearlake, CA

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).

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).

Average pressure
Clearlake, CA

Average pressure - Clearlake, CA

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).

Average wind speed
Clearlake, CA

Average wind speed - Clearlake, CA

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).

Average humidity
Clearlake, CA

Average humidity - Clearlake, CA

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

Average rainfall
Clearlake, CA

Average rainfall - Clearlake, CA

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

Average rainfall days
Clearlake, CA

Average rainfall days - Clearlake, CA

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).

Average snowfall
Clearlake, CA

Average snowfall - Clearlake, CA

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").

Average snowfall days
Clearlake, CA

Average snowfall days - Clearlake, CA

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).

Average daylight / Average sunshine
Clearlake, CA

Average daylight / Average sunshine - Clearlake, CA

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).

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).

Average sunshine days
Clearlake, CA

Average sunshine days - Clearlake, CA

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

Average visibility
Clearlake, CA

Average visibility - Clearlake, 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).

Clearlake, California, USA

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