Napa Valley Weather
No matter what time of year you choose to visit Napa Valley, you will find that the Mediterranean climate is without parallel. The Spring and Summer months feature cloudless days and balmy nights, the Winter rainy season is relatively short and the Fall is so vibrant with color that you will be dazzled daily by the changes! Throughout Napa Valley, and especially in Calistoga, you will find al fresco dining, wineries, hiking, excellent shopping, spa treatments and lodging. There is no better climate in California to enjoy these countless activities.
SPRING in the Napa Valley is full of the promises of pleasures to come. The air is fresh and fragrant with wild flowers, buds and blossoms. The mornings and evenings are crisp while the days offer pleasant temperatures and abundant sunshine. In Calistoga, the weather at this time of year is perfect for taking advantage of exceptional hiking and biking trails as well as just strolling around town. The average Spring temperature in Calistoga is 72 degrees, great for that weekend getaway to the wine country. Moreover, the rainy season usually ends by April 15, and chances are excellent that you will have dry conditions for your trip to Napa Valley.
SUMMER offers a tapestry of green hues as the grapevines mature. During the summer months the temperatures in the Napa Valley vary greatly from those in San Francisco. While one may experience chilly foggy days and nights in San Francisco during the summer, a short drive to the Napa Valley will reward with average daytime temperatures in the 90's with very temperate nights.
The summer sky is virtually always blue and cloudless, and there is almost zero chance of rain from June through mid-September. Visitors from the east will immediately notice that the air is dry, and rarely humid. Napa Valley summer nights are almost invariably cool, with temperatures in the comfortable 55-65 degree range, so most often there is little need for air conditioning while you sleep. It is no wonder that the Napa Valley has been a favorite destination since the 1800's when Robert Louis Stevenson immortalized Calistoga and sang it's praises in his book "The Silverado Squatters".