PITTSBURGH — (WPXI) – The coldest air of the season will have you firing up your furnace and grabbing the extra layers the next few days. High temperatures Monday will struggle to get out the 40s, and low temperatures Tuesday morning will be cold enough to end the growing season for many areas. A freeze watch will start the day Tuesday with many areas seeing temperatures near or below freezing. Scattered rain and snow showers will also be in the area, but no accumulation is expected at this time. The better chance for any accumulating snow comes early Wednesday with some spots seeing the first accumulation of the season.