Tuesday morning thru midday it was sunny, nearly 70F. I went inside to start getting ready for a pedal-only trip to the store before going to work. I could hear some wind kicking up with the roof vents rattling, then I heard thunder about 5 minutes later, and in less than a minute it was dark and pouring cold rain. Some parts of the valley got lots of hard hail, too. It lasted for a couple of hours then let up just long enough for me to get partway to work and started again. As soon as I arrived and went inside, it stopped raining and got partly sunny again for an hour or so, then started raining off and on the rest of the day and night, till around 9pm-ish, I'd guess. Then it got cold because the clouds cleared up.
Yesterday it got sunny and warmish, but dropped more than 30F between sunset and dawn.
Today it again was sunny (even warmer) but dropped more than 20F in just two hours (on my bike ride home), and right now, 2am, it's 28F out there. It was 33F at midnite.
It's a desert, so it is expected that temperature swings will be severe. But some of the weather we get nowadays is much much different than it used to be. It's been changing a lot these last 20-something years.