Crazy Weather!!!!

Why does it feel like winter time and we are already in May??!!! One day it's hot with an 80 degree temperature and the next day it's freezing with a 50 degree temperature. I don't understand!! It's driving me crazy and making a lot of people sick. yuckkk. One night I have the air conditioner and the next day the heater. Sandals one day, boots the next. Short sleeves one day, sweater and jacket the next day. I just want to stick to one thing mother nature thank you!! Next week we are done with finals and we begin our summer vacation but it feels like it's winter break with this crazy weather.