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 perfect. 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Clearlake's climate page.
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% *
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
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tolerable
unpleasant
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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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Clearlake's climate page.
See the full Clearlake climate overview or explore weather in the United States of America.
