Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Clearlake Weather in September
September in Clearlake averages 31°C (88°F) during the day and 12°C (54°F) at night. With only 2.9 mm (0.1 in) of rainfall expected on average, it's a largely dry month.
Rainfall in Clearlake in September
You can typically expect a single day of rain this month, averaging around 2.9 mm (0.1 in). If rain does fall, it tends to be very light and barely worth getting out an umbrella for.
Temperature in Clearlake in September
The temperature in Clearlake in September is excellent. Daytime highs reach 31°C (88°F), with nights dropping to 12°C (54°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Clearlake in September
Enjoy a sunny month with about 275 hours of sunshine, the clear skies make Clearlake even more beautiful.Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May and October typically offer the best weather for Clearlake.
Clearlake Temperature in September
Min Temperature
12°C (54°F)
Max Temperature
31°C (88°F)
Chance of Rain
3%
Precipitation
2.9 mm (0.1 in)
Rainy days
a single day
Sunshine
275 hours *
Percentage Sunshine
77% *
* Data from: Healdsburg, the United States of America (44 KM, 27 Miles).
Clearlake Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Clearlake - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Clearlake in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Clearlake in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming10/10 -
Cycling8/10 -
Walking8/10 -
Barbeque10/10 -
Camping10/10 -
Outdoor sports8/10
Clearlake 3-Day Forecast
More climate data for Clearlake
See the full Clearlake climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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