Updraft® - Minnesota Weather News

From 80s to frost: September roller coaster temperatures ahead

Weather maps showing big swings between summery days and frosty mornings.

Sunset sailing on Lake Minnetonka
Sunset sailing on Lake Minnetonka
Paul Huttner/MPR News

Get ready to ride the September temperature roller coaster.

The weather maps appear to realize that it’s September in Minnesota. That means the battle for seasonal weather turf across Minnesota has begun.

Summer still has ideas about warm, sunny, lake-worthy September afternoons. Autumn insists that frosty mornings are now in vogue. The shove of alternating air masses over Minnesota now begins.

Mostly summery weekend

Saturday and Sunday feel like summer. A cold front sweeps across Minnesota by Labor Day will noticeably cooler breezes.

Strong to severe storms favor Saturday night in the southern half of Minnesota.

Twin Cities area forecast at a glance
Twin Cities area forecast at a glance
Twin Cities National Weather Service

Frosty up north next week

The air mass behind our Labor Day cool front brings attention-getting cold to the central U.S. next week.

NOAA 6 to 10-day temperature outlook
NOAA 6 to 10-day temperature outlook
NOAA/Climate Prediction Center

Highs will not climb out of the 50s by next Tuesday across much of Minnesota.

Forecast high temperatures Tuesday afternoon
Forecast high temperatures Tuesday afternoon
NOAA

Frost is likely up north next week as temperatures dip into the 30s in the morning hours.

Forecast minimum temps Wednesday
Forecast minimum temps Wednesday
NOAA

Summery again?

The upper air maps support a return of warmer air between about September 12-20.

NOAA’s week 3-4 temperature maps suggest warmer than average temperatures in late September.

NOAA week 3 and 4 temperature outlook
NOAA week 3 and 4 temperature outlook
NOAA

Meteorological summer may be over, but we may not be done with summer temperatures just yet.

Stay tuned.