New Years Eve Nightly Forecast: Temperatures will slowly drop through the night with overnight temperatures in the upper 20's to mid 30's. Clouds will also start to roll in overnight starting with Carbon County and working their way east. Winds are expected to pick up about 2am for slightly breezy conditions in Southeast Wyoming. Cooler temperatures are expected in the Nebraska Panhandle as they will have clearer skies longer allowing them to cool off quicker but temperatures in the mid 20's can still be expected.