In April, the weather in South Lake Tahoe is typically cold. Average daily high temperature in April is about 8 degrees above zero. On average, South Lake Tahoe has 12 sunny, 10 partly cloudy, 7 rainy, and 1 cloudy day in April. The rains are usually moderate. April as well as January, February, March, and November is considered the most uncomfortable time to visit South Lake Tahoe.