After our weekend brought highs in the 70s, we're set to see temperatures plunge as we progress into the new workweek. Get ready for some cold fall temperatures, the coldest we've seen so far this season. A low-pressure system lingers across the area, providing northwest flow and some breezy conditions. Temperatures will be in the mid-40s as you step out the door this morning. Add to that the breezy conditions, with gusts up to 25 mph, you may want to have that jacket or flannel worn on your way to work. Temps only get into the 50s by lunchtime. Mostly cloudy skies and 50s entering the afternoon. High temperatures today only get into the mid-to-upper 50s thanks to northwest flow bringing in quite the chilly air mass. Say goodbye to the warmer afternoons, at least for now. A few pockets of sunshine will be seen this afternoon, although we'll stay mostly cloudy. There will be more chances for scattered showers, relegated mainly to the evening and overnight hours. Skies stay mostly cloudy for the afternoon, becoming partly cloudy overnight. High temperature of 57° for Fort Wayne. A few pockets of afternoon sunshine. Tuesday will have some sunshine in store with partly cloudy skies. It will still be breezy with gusts up to 25 mph, and with a slight chance for a rain shower early in the morning as the weather system fully departs. It will be even cooler than today, with highs in the low-to-mid 50s. This chilly pattern continues into Wednesday as well, where we're still in the 50s then. Overnight lows most this week will be in the 30s, and one of these nights looks to bring a likely frost, which is Wednesday night and into Thursday morning. This will be from the combination of lows in the lower 30s and mostly clear skies. We'll keep you up-to-date as new data comes in, but take some precautions to protect any sensitive plants before heading to bed Wednesday. A true taste of autumn is here for the beginning of this workweek!The best chance for frost this week will be Wednesday night into Thursday morning. High temperatures don't stay in the 50s after Wednesday, where temperatures rise into the 60s for the remainder of the workweek, and 70s over the weekend. Today: Mostly cloudy with scattered rain showers. Cool and breezy.High: 55°Winds: NW 5-15 mph, with gusts up to 25 mph Tonight: Partly cloudy with scattered rain showers.Low: 38°Winds: NW 5-10 mph Tuesday: Partly cloudy with the slight chance for a rain shower, especially early. Cool and breezy.High: 53°Winds: NNW 5-15 mph, with gusts up to 25 mph Tuesday Night: Partly cloudy and cold.Low: 36°Winds: NW 5-10 MORE WEATHER RESOURCESInteractive Radar and Regional RadarWeather CamerasWeather Alerts