Crisp Fall evening October 13th 2013 Hiawatha,Iowa

The areas 1st frost of the season was reported in a 2 consecutive nights this past week as temperatures dipped into the middle to lower 30s with some areas getting a killing frost. The 1st night with frost went virtually un warned by local weather outlets. A cool crisp high pressure system that settled in behind a cold front that past through over the weekend is the cause of the frost. The frost is general was said to be quite heavy in outlying areas and countrysides where temperatures as cool as the lower 30s were reported. However large metropolitan areas away from airport readings did not see frost and temperatures remained in the upper 30s. Inner city areas around Waterloo-Cedar Falls, Cedar Rapids and Iowa City where there are large concentrations of buildings and pavement prevented frost from forming. Here in Hiawatha, I had a low of 38.F both Sunday morning and Monday morning. I did not have frost in the lawn and no plants were effected.

Coldest Morning Lows October 13th-14th

 Monticello 30.F
Waterloo Airport 32.F
Williamsburg 33.F
Robins 34.F
Coralville 34.F
Iowa City Airport 36.F
 Independence 36.F 
South Waterloo 36.F
Marion 36.F
Eastern Iowa Airport 37.F
Central City 37.F
 Hiawatha 38.F 
Downtown Cedar Rapids 40.F