Lake Tahoe enjoys strong contrasts between winter and summer. The area receives 25 feet (7 meters) of snow on average each winter but the summers are dry. While winter temperatures drop to -20F (25C) on rare occasions, a typical winter day is sunny with the temperature hovering near the freezing point.
By spring, the day temperature is 50 to 60F (10 to 15C). Late spring, summer, and fall offer warm, dry weather with typical day temperatures around 80F (27C). Night temperatures usually drop into the fifties. Combined with very low humidity, its a golfer's dream! Air conditioning isn't needed at Tahoe with the very dry air and cool evenings.
Winter or summer, 80% of the days at Tahoe offer brilliant sunshine. With high altitude and low humidity, the warm seasons at Tahoe are refreshingly comfortable. It's a perfect place to tan! Lake Tahoe seldom experiences the extreme heat and humidity of typical "sun" resorts.
Bottom line - be prepared. Dress seasonally in layers for comfort and safety.