May in the Napa Valley furnishes visitors with an example of summer and spring simultaneously for certain significant length of especially warm daytime temperatures and a couple of truly cool nights.
The ordinary May temperature in Calistoga is 64 degrees, with a run of the mill high of 78, and a commonplace low of 46 degrees. The normal precipitation in Calistoga for May is 1.4 inches.
In spite of the way that it is still really spring, May in Napa Valley regularly feels like summer. In May 2014, for example, high temperatures were generally in the 70’s and 80’s with the temperature outperforming 90 on five days. Precipitation is basically non-existent in May, with typical month to month precipitation of just a half inch. There isn’t exactly a cloud and the sun shines 11 hours consistently.