After a cool end to last week, the warm up continues: most Valley locations warmed into the upper 80's on Sunday. And Mother Nature isn't done yet, as the beginning of June looks even warmer. Porterville saw a high of 88 on Sunday, with Fresno, Visalia, Merced, and Hanford all topped out at 89. VIDEO We're not done with the warm - up: look for highs in the low 90's on Monday. It'll get even hotter than that later this week, with highs in the middle to upper 90's.