As we have crossed into the month of May, a few notes. The month of May is the month where we typically see the last frost of the year (the lastest average last frost is mid-May in NW Iowa) until at least late October. Severe Weather ramps up this month, as was evident with the tornado in Parkersburg and New Hartford back on May 25th last year. Temperatures begin to ramp up with the average highs heading well into the 70s and average lows heading into the 50s. Average Precipitation for May is between 4-4.5 inches.