Clearlake (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Clearlake.
Climate overview of Clearlake
Clearlake, California, United States of America, sees big temperature differences between seasons, with July peaking at 34°C (93°F) and December dropping to 13°C (55°F).
Annual rain/snowfall is moderate at around 608 mm (24 in), with December being the wettest month. The city also has a distinct dry season from May to October, with very warm summers and mild winters. The sunniest month is May, with 10.3 hours of sunshine per day on average.
Clearlake Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Clearlake - and find the best time to visit.
Monthly Temperature in Clearlake
Visitors to Clearlake can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 34°C (93°F) in July. In December, the coolest month of the year, temperatures drop to a moderate 13°C (55°F).
At night, temperatures range from around 15°C (59°F) in July to 2°C (36°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Clearlake
Generally, Clearlake experiences moderate precipitation patterns, averaging 608 mm (24 in) yearly. Clearlake can be quite wet during December, receiving approximately 130 mm (5.1 in) of precipitation over 13 rainy days.
In contrast, during the driest month (August), you will experience much drier conditions, with 0 mm (0 in) of precipitation spread across 0 rainy days. For more details, please visit our Clearlake Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Clearlake
Clearlake can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 10.3 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Clearlake
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May and October
- Warmest weather: July and August
- Most sunshine: April, May, June and July
- Fewest rainy days: June, July, August and September
- Wettest months: January, February, March, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from May to October, with very warm summers and mild winters
Frequently asked questions about the climate in Clearlake
What is the best time to visit Clearlake?
April, May and October typically offer the most optimal weather in Clearlake. In contrast, July and December tend to have less optimal conditions. Clearlake has a distinct dry season from May to October, with very warm summers and mild winters.
What temperatures can I expect in Clearlake?
Daytime highs range from 13°C (55°F) in December to 34°C (93°F) in July. Nighttime lows range from 2°C (36°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Clearlake get?
Annual rainfall is around 608 mm (24 in). December is the wettest month with 130 mm (5.1 in), while August is the driest with 0 mm (0 in).
How sunny is Clearlake?
Clearlake receives around 3,042 hours of sunshine per year. May is the sunniest month with 310 hours, while December is the cloudiest with just 160 hours. Overall, Clearlake enjoys abundant sunshine.
Clearlake 3-Day Forecast
Clearlake on the map
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Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
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