Labor Day Weather for Northern Illinois:   Statistics for Chicago and Rockford

 

Rockford:
The following statistics comprises 107 years of data. Data collection for Rockford was at the Greater Rockford Airport.

Graph of high temperatures at Rockford for Labor Day
Frequency distribution of high temperatures for Rockford. This dataset shows that the most frequent range of high temperatures on Labor Day is in between 80 and 89 degrees. There is no normal high temperature since Labor Day does not occur on the same day every year. The highest temperature is 96 degrees on September 4th, 1922. This is one of eleven times that the high temperature reached the 90s on Labor Day in Rockford’s history. The coldest high temperature on Labor Day is 61 degrees which occurred on September 2nd, 1974. In 2011, the high temperature was 66 degrees.

Graph of Low Temperatures on Labor Day at Rockford
Frequency distribution of low temperatures for Rockford. This dataset shows that the most frequent range of low temperatures on Labor Day is in between 50 and 59 degrees. There is no normal low temperature since Labor Day does not occur on the same day every year. The lowest temperature on Labor Day is 35 degrees which occurred on September 2nd, 1946. The highest low temperature for Labor Day was 72 degrees on September 2nd, 1912. In 2011, the low temperature was 50 degrees, which is in the most common range of low temperatures.

Graph of Precipitation on Labor Day at Rockford
Frequency distribution of precipitation for Rockford. This dataset shows that the most frequent amount of precipitation recorded on Labor Day is 0.00”, which accounts for 54% of the days in the dataset. The next most frequent range is the 0.02” to 0.25” of precipitation. The highest amount of rainfall on Labor Day occurred on September 1st, 1930 when 1.33” of rain fell. There have been 3 instances dating back to 1905 where over an inch of rain fell on Labor Day. In 2011, no precipitation fell.

 

ADDITIONAL LABOR DAY CLIMATE DATA      ( * MEANS LAST OCCURRENCE)

MAX TEMP
WARMEST

 MIN TEMP
WARMEST		 PCPN
WETTEST
96
1922		 72
1912		 1.33
1930
95
1959 *		 71
1959		 1.32
1963
94
1933		 70
1983 *		 1.30
1936
93
1929		 69
1970 *		 0.86
2002
92
1927		 68
1960 *		 0.85
1926
 
MAX TEMP
COLDEST		 MIN TEMP
COLDEST		 PCPN
DRIEST
61
1974		 35
1946		 0.00
2009 *
63
1935 		42
1953		 T
2010 *
65
1988		 44
1988		 0.01
1974 
66
2011 *		 45
1976 *		 0.02
1949 *
67
1905		 47
1950 *		 0.04
1998 *

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