Freezing Temperatures: Past Due

Our climatological averages (high temperatures, low temperatures, daily rainfall, etc.) are calculated every 10 years.  Our current “average” uses weather data compiled from every day between the years of 1981 and 2010.

Average First 32° Temperature

Average First 32° Temperature

On average, most of northern Illinois and southern Wisconsin has its first 32-degree temperature between October 1st and October 10th.  That has not been the case this year.  In fact, Rockford has not fallen below 40 degrees since May 13th—five months ago!  However, in 9 out of 10 years, we see at least one 32-degree reading by October 22nd.  The latest observed (between 1981 and 2010) is October 28th.

Average First 32° Temperature

Average First 32° Temperature

Frost Advisories and Freeze Warnings are in effect for the northern Great Plains for late Saturday night and Sunday morning.  Here in the Stateline, Sunday morning temperatures will generally be in the lower 40s with a few spots dipping into the upper 30s.

Frost Advisories to our West for Sunday Morning

Frost Advisories to our West for Sunday Morning

 

Monday morning will be a bit colder, however.  With high pressure in control—clear sky and calm wind—temperatures will fall into the upper 30s for Rockford.  Other areas could dip into the middle 30s.  There is a small frost potential for Monday morning, mainly for the usual cool spots in rural low-lying areas and sheltered valleys.  Should any frost develop, it will be light and patchy in nature.

By the end of next week, temperatures may once again dip into the 30s.  Keep it tuned to the weather blog and our website for the latest forecast information. -Joe

 

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Posted under 13 Climate Authority, frost, statistics, weather

This post was written by qni_it on October 12, 2013

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