So, let's break it down by region: Northern California tends to be cooler, with average highs in the mid-70s to low 80s (23-27°C), while Southern California is usually warmer, with average highs in the mid-80s to low 90s (29-32°C). And then there's the Sierra Nevada mountain range, which is like the temperature rollercoaster - it can get hot during the day and chilly at night.
California Temperature Map By Month
Now, I know what you're thinking, "What about heatwaves?" Well, let me tell you, they do happen in California, especially in the deserts and Central Valley. But don't worry, they're usually short-lived, and the state has plenty of cooling centers and water parks to help you beat the heat.
In conclusion, California's average summer temperature is all about variety and location, location, location. So, pack your sunglasses, sun hat, and sunscreen, and get ready to enjoy the golden state's amazing summer weather. Just remember, it's always a good idea to check the forecast before heading out, or you might end up like me - roasting like a marshmallow over a campfire.