remember landing at Palm Springs, wife and me deciding it was too hot (35 degrees C), so we took off again, and landed at Big Bear City, 8000-ish feet up in the mountains, where it was around 20 C
I did just this a couple of months ago. Left Torrance where it was 22 degrees, landed at Big Bear for breakfast where it was 8 degrees then round to Palm Springs where it was 43 degrees! All in less than three hours flying at 100kts.