weather in napa ca in november
Napa Valley Weather Napa Valley November Weather. 1  The weather in November in the Napa Valley is changeable. 2  In November, the average temperature in Calistoga is 53 degrees, with an average high of 66, and an average low of 40 degrees. 3  While the weather may be somewhat unpredictable in November, it is only so by California standards.