Clearlake Weather in August

What's the weather like in Clearlake (California) in August 2025?

The climate in Clearlake during August can be summarized as warm and very dry.

August is in the summer in Clearlake and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a comfortable 30°C (86°F), whilst at night 11°C (52°F) is normal.

Clearlake weather averages (imperial / metric)
Daytime temperature 29.8°C 85.6°F
Nightly temperature 10.9°C 51.5°F
Average temperature 20.3°C 68.5°F
Daily sunshine 11.5 hrs
Avg rainfall 5 mm 0.2 ins
Rainy days 2 days
Sea temperature 14°C 57.2°F
Humidity 64%
Windspeed 15.8kph 10 mph

On average August is the 2nd driest month of the year in Clearlake with around 5mm 0.2 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.5 hours of sunshine per day.

August temperatures in Clearlake

Clearlake average temperature in August

August rainfall

Clearlake average rain in August

August hourly sunshine

Clearlake average rain in August

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Clearlake in August 2025.

Other monthly averages

Best places to visit in August

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Clearlake weather stats

Clearlake weather statistics
Hottest month: July 29.7°C 85.5°F
Driest month: July 2mm 0.1ins
Sunniest month: July 12.6hrs
Coldest month: January 11.7°C 53.1°F
Wettest month: January 205mm 8.1ins
Map showing location of Clearlake (38.95823, -122.62637) Clearlake map pin © Google

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