Now that we're past the Autumnal Equinox and the sun's most direct rays are going south of the equator, those with the green thumb have to monitor overnight low temperatures very closely as a plant-killing frost and freeze becomes more likely. The Twin Cities have yet to reach into the 30's overnight...but soon enough. The average first frost (32 degrees) occurs around October 7. The average first hard freeze (28 degrees) occurs around the 20th of October. For those itching to ride the fat bikes, the initial soil freeze happens around December 8th, a time when the snow has a better chance of sticking to the trails.
If you can remember, we had a very wet start to the warm biking season. Our late Spring and early Summer was quite soggy and, as a result, the corn crop got planted late. Now with the onset of our first frost and freeze, the still maturing corn crop has an even greater risk of freeze-related yield loss this year as the graphic below indicates.
Climate scientists, however, have been noting that since 1970, much of the U.S. has seen the frost-free season get longer including in Minneapolis/St. Paul according to Climate Central. The graphic below shows that, during any given year, the number of days between the last and first frost are increasing.
Might be a good idea to get your trail riding in early this week because rain chances begin to increase into the weekend. Rain arrives Friday through Saturday likely resulting in trail closures over the weekend.
Wednesday: Mostly sunny. H: 74° Wind: SE 4
Wednesday Night: Mostly clear, light breeze. L: 56° Wind: SE 10
Thursday: Mostly sunny, warmer & breezy. H: 78° L: 62° Wind: SE 10-15
Friday: Increasing clouds and rain. H: 75° L: 57° Wind: S 10
Saturday: Scattered rain. Total rain: ~0.35" H: 66° L: 52° Wind: WNW 10
Sunday: Clearing yet dry. H: 70° L: 53° Wind: SW 7
Summer brings warm afternoons perfect for biking, but the summer heat and humidity can also spark thunderstorms and severe weather. Be prepared for any type of adverse weather headed your way with Aeris Pulse.
NWS Twin Cities Weather Story