Sunday was the coldest day in Rockford since May 21st, where the official high temperature was 56°. Sunday reached a high of 65°, the coldest day of the summer season. For those of you who want more summer conditions, then you are in luck!
Beginning Monday, temperatures and dew points are gradually going up. Monday will have highs in the mid-to-upper 70's and dew points in the low 60's. Winds will be coming from the Southeast, which will begin the transition to a more "moisture-filled" atmosphere here in the Stateline.
Beginning later Monday, the atmosphere will be more on the humid side. But it will turn both hot and humid on Tuesday. This is when temperatures will reach into the mid-to-upper 80's and dew points will be closer to 70°. Because of this, heat indices will be near 90 on Tuesday.
There are isolated rain chances later on Tuesday and going into Wednesday, but we are thinking mainly just some showers. Wednesday continues the warm pattern, with high temperatures once again in the upper 80's and heat indices near or slightly above 90° with the higher dew points.
Thursday looks to be the last day of the heat and humidity, with highs in the upper 80's, before a cold front will move through the region Thursday evening, which also gives us the biggest risk for rain and some thunderstorms as well.
Going through September, our pattern looks to be on the warmer side and potentially wetter side as well.