What a Difference a Year Makes! July 2013 vs. July 2012

July 2013 was a dry to very dry month for most of our area, with a few localized exceptions in parts of northeast Illinois. In fact, in many cases, it was a drier month than the drought stricken July 2012. The dry conditions is where the similarities between the two months ends, as you can see in the graphic below for Chicago and Rockford, our two primary climate sites. Note the tremendous difference from the extreme (record warm at RFD) heat that gripped most of July 2012 to the relative cool that we saw this July, especially late in the month, with a record low high temperature of 65 degrees set at both Chicago and Rockford on July 27th.

Comparing July 2013 and July 2012 at Chicago and Rockford

* Long term average for 100o July days: Chicago: <1; Rockford: 1

** Long term average for 90o July days: Chicago: 6; Rockford: 8

July Climate Summary: Chicago | Rockford

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
935 AM CDT THU AUG 1 2013

...A LOOK BACK AT THE CLIMATE FOR THE MONTH OF JULY 2013 FOR
CHICAGO AND ROCKFORD...

AT CHICAGO...THE AVERAGE HIGH TEMPERATURE WAS 81.8 DEGREES WHICH IS
2.3 DEGREES BELOW NORMAL. THE AVERAGE LOW TEMPERATURE WAS 64.5
DEGREES WHICH IS 0.6 OF A DEGREE ABOVE NORMAL. THE AVERAGE
TEMPERATURE FOR THE MONTH WAS 73.2 DEGREES WHICH IS 0.8 OF A DEGREE
BELOW NORMAL. ONLY 2.22 INCHES OF PRECIPITATION WAS RECORDED WHICH
IS 1.48 INCHES BELOW NORMAL.

ONE RECORD WAS SET IN THE MONTH OF JULY...2013 AT CHICAGO. ON JULY
27...THE HIGH TEMPERATURE REACHED ONLY 65 DEGREES. THIS SET THE
RECORD FOR THE LOW MAXIMUM TEMPERATURE FOR THAT DATE. THE OLD RECORD
WAS 69 SET IN 1981.

AT ROCKFORD...THE AVERAGE HIGH TEMPERATURE WAS 82.7 DEGREES WHICH
IS 1.8 DEGREES BELOW NORMAL.  THE AVERAGE LOW TEMPERATURE WAS 62.5
DEGREES WHICH IS 0.5 OF A DEGREE BELOW NORMAL.  THE AVERAGE
TEMPERATURE FOR THE MONTH WAS 72.6 DEGREES WHICH IS 1.2 DEGREES
BELOW NORMAL. ONLY 1.92 INCHES OF PRECIPITATION WAS RECORDED WHICH
IS 2.03 INCHES BELOW NORMAL.

ONE RECORD WAS SET IN THE MONTH OF JUNE...2013 AT ROCKFORD. ON JULY
27...THE HIGH TEMPERATURE REACHED ONLY 65 DEGREES. THIS SET THE
RECORD FOR THE LOW MAXIMUM TEMPERATURE FOR THAT DATE. THE OLD RECORD
WAS 67 SET IN 1981.

$$
BN
July 2013: A Dry Month for Most of the Area, Except for a Small Portion of Northeast and Central Illinois
 
Observed Precipitation

Observed Precipitation in July 2013

Departure from Normal PrecipitationDeparture from Normal Precipitation July 2013
Percent of Normal PrecipitationPercent of Normal Precipitation July 2013


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