A string of 80 degree warmth will make it feel more like the beginning of summer rather than the middle of spring. Following the weekends warmth of the low 80's, temperatures will warm into the upper 70's and low 80's Monday afternoon.
Following a warm front Monday night, temperatures will really warm Tuesday afternoon pushing highs into the mid and upper 80's! Right now I'm forecasting a high of 86 degrees Tuesday afternoon. Rockford's record high is 90 degrees set back in 1992. Looks like we'll be very close to that Tuesday.