Accuweather Forecast: Warm up starts KFSN We start warming up today with temperatures in the 40s and 50s to start the morning. We'll reach highs in the mid to upper 70s across the Valley. Fresno reaches a high of 77 degrees. Air quality forecast is moderate for most of the Valley. Merced and Madera are good. We stay sunny and dry today in the Valley. There is a chance of an afternoon rain and snow mix over the high Sierras today and tomorrow afternoon. We warm up even more tomorrow reaching the 80s. We stay in the 80s this weekend and hit the 90s on Monday.