I'm looking at Weather.com and it forecasts a high of 80° on Monday. 66° on Sunday and 61° on Tuesday. I'd expect that the high will pan out to be more in the low to mid sixties.
Accuweather.com suggests a high of 62° on Monday, which makes much more sense.
Well NWS has the forecast in the 70-72f range coming off a low in upper 40's