A look back at Summer 2013

Summer 2013

Temperatures

Overall the summer of 2013 will go in the books as being just below average for temperatures at both Chicago and Rockford.  Although there were some short periods of heat, with a total of 9 (10) days of 90+ degree temperatures observed at Chicago (Rockford), the main story this summer was the number of unseasonably cool days during the season, especially in late July. There were a total of 25 (14) days during the season in which the daily high temperature was 75 degrees or less at Chicago (Rockford). This is the highest number of such days since the cool summer of 2009. The most notable day was the 27th of July when the high temperature at both Chicago and Rockford only reached 65 degrees. This broke the record for the coolest high temperature for the date.
Although there were 9 (10) days of 90+ degree temperatures at Chicago (Rockford), there were no 100+ degree temperatures observed at either site. The highest temperature observed at both sites was 96 degrees.  This is in stark contrast to the conditions observed during the hot summer of 2012, when there were 40 (41) days of 90+ degree temperatures at Chicago (Rockford). The highest temperature during the summer of 2012 was 103 (105) degrees at Chicago (Rockford).  
 
Precipitation
Rainfall amounts for the entire summer of 2013 totaled 10.14” at Chicago and 12.56” at Rockford, which are a bit below normal for the season as a whole. However, these numbers alone don’t tell the whole story. A total of 61% of the summer rains fell back in June.  Since then, the area has been dry, with rainfall only running about 50% of normal.
 
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1230 PM CDT SUN SEP 1 2013

...A LOOK BACK AT THE CLIMATE FOR SUMMER 2013 FOR CHICAGO AND
ROCKFORD...

AT CHICAGO...THE AVERAGE HIGH TEMPERATURE FOR THE SUMMER SEASON WAS
80.9 DEGREES WHICH IS 1.0 DEGREE BELOW AVERAGE. THE AVERAGE LOW
TEMPERATURE WAS 62.2 DEGREES WHICH IS 0.5 OF A DEGREE ABOVE AVERAGE.
OVERALL...THE AVERAGE TEMPERATURE FOR THE SEASON WAS 71.6 DEGREES
WHICH IS 0.2 OF A DEGREE BELOW NORMAL.

A TOTAL OF 10.14 INCHES OF PRECIPITATION WAS RECORDED DURING THIS
PAST SUMMER...WHICH IS 1.91 INCHES BELOW NORMAL.

THERE WERE 4 RECORDS EITHER BROKEN OR TIED DURING THE METEOROLOGICAL
SUMMER OF 2013 IN CHICAGO.

JUNE 26...THE RECORD RAINFALL OF 1.48 INCHES FOR THE DAY WAS SET.
THE OLD RECORD OF 1.45 INCHES WAS SET IN 1932.

JULY 27...THE RECORD LOW MAXIMUM TEMPERATURE OF 65 FOR THE DATE WAS
SET. THIS BROKE THE OLD RECORD OF 69 SET IN 1981.

AUGUST 27...THE RECORD WARM MINIMUM TEMPERATURE OF 77 DEGREES WAS
TIED. THIS RECORD WAS ESTABLISHED IN 1973.

AUGUST 30...THE RECORD HIGH TEMPERATURE OF 96 DEGREES WAS TIED. THE
RECORD WAS SET IN 1953.

AT ROCKFORD...THE AVERAGE HIGH TEMPERATURE WAS 81.9 DEGREES WHICH IS
0.8 OF A DEGREE BELOW NORMAL. THE AVERAGE LOW TEMPERATURE WAS 60.8
DEGREES WHICH IS 0.2 OF A DEGREE BELOW NORMAL. OVERALL...THE AVERAGE
TEMPERATURE FOR THE SEASON WAS 71.3 DEGREES WHICH IS 0.5 OF A DEGREE
BELOW NORMAL.

A TOTAL OF 12.56 INCHES OF PRECIPITATION WAS RECORDED DURING THIS
PAST SUMMER...WHICH WAS 0.63 OF AN INCH BELOW NORMAL.

THERE WERE 2 RECORDS BROKEN DURING THE METEOROLOGICAL SUMMER OF 2013
IN ROCKFORD.

JULY 27...THE RECORD LOW MAXIMUM TEMPERATURE OF 65 FOR THE DATE WAS
SET. THIS BROKE THE OLD RECORD OF 67 SET IN 1981.

JUNE 22...A RECORD RAINFALL OF 2.36 INCHES WAS SET FOR THE DATE.
THIS BROKE THE OLD RECORD OF 1.80 SET IN 1914.


Return to News Archive

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.