Temperatures around 50 degrees Sunday provided area residents a chance to finish yardwork, put up holiday lights or go for an outdoor workout.
But a cold front is due to arrive Tuesday with the coldest air yet this season.
High temperatures near 50, which were expected to continue into Monday, will disappear quickly with the low for Tuesday night predicted to be 21 degrees.
The cold front will arrive in the afternoon following a partly cloudy morning. Tuesday night will be windy and cloudy.
Brian Wimer, senior meteorologist at AccuWeather, said area residents should be prepared for significantly colder weather on Wednesday, with a high of 29 and a low of 10.
The colder conditions are caused by a “jet stream dipping further south from northern Canada,” Wimer said, and that it's a little early for eastern Nebraska to hit temperatures this low. The normal high temperature is 39 degrees for the beginning of December, but record lows have dropped below zero.
However, there is little to no precipitation predicted for the week. Travelers to western Nebraska could see snow, but no more than a couple of inches.
After cloudy skies Tuesday night and a partly cloudy Wednesday, Thursday will have some sunshine, with a high of 20 degrees and a low of 4.
Friday will return to partly cloudy with a high of 17. By Friday night, the low will drop to 3 degrees.