The temperature pattern across the U.S. next week will ride a roller coaster. The northeast has already seen its share of ups and downs in the last couple of weeks. And after a weekend warm up, a trough of low pressure will bring a chance of rain and cooler air.
But the biggest temperature extremes will be as a ridge of high pressure builds into the central parts of the country. Temperatures as far north as the Canadian border in Montana will hit the 80s by Monday. Monday’s highs from the southern to the northern high plains will be 10-20 degrees above average.
Cities like Denver, Colorado will begin to see the ridge building in Sunday. Temperatures will stay warm through Wednesday. But for much of the central U.S., highs have a good chance at staying above average into the second half of the month. 
