What - you don't know what Sprummerall is??
Why it is that time of year, in Southern California when it can be very Spring like one day (cool and around 70F) and the next it will be high Summer and very hot (100+F) and then cool off so much it is like Fall (temperatures in the mid-60's F).
Add these three seasons together: SPRing - sUMMER - fALL and viola, you have SPRUMMERALL.
Now, if it would only Snow ;=)