The Temecula wineries located in Temecula Valley in Southern California, the wine is good, the area is not as impacted and it's just a hop, skip and jump away from metropolitan areas like Los Angeles and San Diego.
As far as the region itself, it's not a secret that Southern California enjoys a good deal of warm sun…but Temecula gets a chill-down: the eastern valleys heat up, warm air rises, creating a low-pressure system.
There's also Temecula in Southern California that has a long history of winemaking but it's off the beaten track and doesn't have the magnetic appeal like Napa does or even Monterey.
By researching the wineries that are in Temecula, you can get an idea of which wineries you want to visit and which ones are not quite what you're looking for.
Although these are just a few suggestions if you're planning a trip to Temecula wineries, be sure to check out others as well before your next trip.