I’m planning a trip to Napa Valley in July and I’m wondering what the weather is like at that time of year. I’m hoping for warm, sunny days and cool, comfortable nights. I’m curious to know if the temperatures are mild or if there are extreme highs and lows. I’m also interested in learning about any potential rainfall or storms that might occur during the month of July. Any insight into the climate of Napa Valley during the summer months would be greatly appreciated.