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Labor Day Weather for Northern Illinois: Statistics for Chicago and Rockford
Rockford:
The following statistics comprises 104 years of data. Data collection for Rockford was at the Greater Rockford Airport.
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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. Last year, the high temperature was 90 degrees.
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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. Last year, the low temperature was 61 degrees, which is in the 2nd most common range of low temperatures.
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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. Last year, no rain fell on Labor Day.
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