Most of President’s Day weekend will be gorgeous in Utah — sunny and unseasonably warm. Until Monday, that is, when a winter storm is expected to drop snow on most, if not all, of the state.

In Salt Lake City, it will be about 50 on Saturday and Sunday, 5-10 degrees above normal, according to the National Weather Service. However, temperatures will drop to the mid-30s and the first of “several bands of precipitation” is expected Monday morning, with additional bands arriving  through Wednesday.

There’s a 70% chance of snow on Monday, and there could be 2-4 inches of accumulation in northern Utah valleys. It’s going to get a lot colder — expect highs in the upper 20s to about 30 on Tuesday, Wednesday and Thursday — and there’s at least a slight chance of snow on each of those days.

Overnight lows will be frigid: 18 on Monday, 12 on Tuesday, and 12 on Wednesday.

In northern Utah mountains, snow accumulations “are looking to stay under a foot, but not by much,” according to the National Weather Service. Although not a lot of additional snow is expected on Tuesday, winds could " lead to blowing snow concerns along I-80.”

There could even be some snow Monday in southern Utah. After sunny skies and highs in the mid-60s on Saturday and Sunday, temperatures will drop to the mid-50s on Monday in St. George — and there’s a 40% chance of rain mixed with snow, continuing into Monday night. The sun will return on Tuesday, Wednesday and Thursday, but daytime highs will be in the mid- to upper 40s and overnight lows will dip into the 20s.

According to the Utah Department of Environmental Quality, air quality will be green/good across the state.