Water Temperature: The upper 12 feet of the lake can warm to 68
degrees Fahrenheit in the summer. Below 700 feet and in the winter,
the temperature remains a constant 39 degrees Fahrenheit.
Volume: Lake Tahoe holds an estimated 122,000,000 acre feet of water
or 39,750,000,000,000 gallons; Yes 39.75 trillion gallons! That's
enough to cover the entire state of California with 14 inches of water.
The water that evaporates from Lake Tahoe each day is enough to supply
3,500,000 people with water that day.
Depth: The average depth of Lake Tahoe is 989 feet. The deepest point
is 1,645 feet. It is the third deepest lake in North America. The
U.S. Bureau of Reclamation controls the top 6.1 feet of the lake as a
reservoir.
Purity: The water in Lake Tahoe is 99.9% pure, about the same as
distilled water. It is so clear that a dinner plate can be seen 75
feet below the surface.
Climate: The sun shines at Lake Tahoe during more than 84% of the year
or over 307 days. The average temperature in January ranges from 18 to
36 degrees. Direct sunlight can raise the reading to nearly 100
degrees. Except for periods of heavy snowfall, the climate is dry. In
July, the average daytime high temperature is 78 degrees with little or
no humidity.