90s Gone Missing

This past Tuesday, Fargo Moorhead recorded our 8th 90 degree day of the year, although, just barely as the high only reached 90 degrees that afternoon.  With our 90 degree season winding down, it seems likely we will finish the year with a below average number of 90 degree days for the 4th year in a row.

During our current wet phase we have been averaging 10 such days, a subtle, yet noticeable departure from the historical average of 13.  More cloud cover and moister soils conditions can be blamed for our reduction of hot days in the region.   Although the decades of the 1960s and 1970s were generally cooler overall than recent years, even those two decades saw an average of fifteen 90 degree days per year.  Those years would be an example of how drier soils and sunnier sky conditions can lead to more extremes in our climate.

Once this wet phase ends, more abundant hot days will return, until then, more summer with fewer extremely hot days will probably continue.