780  
NOUS43 KLOT 220844  
PNSLOT  
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-  
230000-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE CHICAGO IL  
344 AM CDT FRI SEP 22 2017 /444 AM EDT FRI SEP 22 2017/  
   
..RECORD LATE SEASON HEAT NUMBERS
 
 
LATE SEPTEMBER 2017 IS SEEING NEAR TO RECORD WARMTH ACROSS A  
SIZABLE PORTION OF THE MIDWEST, INCLUDING NORTHERN ILLINOIS AND  
NORTHWEST INDIANA. FOLLOWING ARE CLIMATOLOGICAL NUMBERS TO PUT  
THIS ONGOING LATE SEASON HEAT INTO PERSPECTIVE.  
 
**************************************************************  
CHICAGO  
 
RECORDS DATE BACK TO 1871.  
 
DATE 2017 HIGH RECORD HIGH 2017 LOW RECORD WARM MINIMUM  
--------------------------------------------------------------  
9/20 92* 91 (1931) 62 73 (1931)  
9/21 94* 92 (1970) 72 76 (1931)  
9/22 92 (1956) 73 (1895)  
9/23 91 (1937) 71 (1891)  
9/24 91 (1891) 71 (1930)  
9/25 90 (1933) 76 (1931)  
 
* = RECORD  
 
2017 HAS SEEN THE LATEST 90+ SINCE 2007 (SEPT 24).  
 
LATEST 90+ DEGREE READING ON RECORD: OCT 6, 1963 (94)  
LATEST 95+ DEGREE READING ON RECORD: SEPT 29, 1953 (99)  
 
LATEST STRETCHES OF 3+ CONSECUTIVE DAYS OF 90+:  
1. SEPT 30-OCT 2, 1971  
2. SEPT 19-22, 1895  
 
LATEST THE ANNUAL HIGH TEMPERATURE OCCURRED: SEPT 14 IN 1893,  
1915, AND 1927.  
 
THE HIGHEST TEMPERATURE IN 2017 HAS BEEN 95 ON JUNE 12.  
 
**************************************************************  
ROCKFORD  
 
RECORDS DATE BACK TO 1905.  
 
DATE 2017 HIGH RECORD HIGH 2017 LOW RECORD WARM MINIMUM  
--------------------------------------------------------------  
9/20 91 92 (1920) 63 74 (1895)  
9/21 89 94 (1920) 69 70 (1895)  
9/22 93 (1937) 65 (1959)  
9/23 92 (1937) 66 (1920)  
9/24 92 (1920) 70 (1930)  
9/25 95 (1920) 69 (1972)  
 
* = RECORD  
 
2017 HAS SEEN THE LATEST 90+ SINCE 2010 (OCT 9).  
 
LATEST 90+ DEGREE READING ON RECORD: OCT 9, 2010 (90)  
LATEST 95+ DEGREE READING ON RECORD: SEPT 25, 1920 (95)  
 
LATEST STRETCHES OF 2+ CONSECUTIVE DAYS OF 90+:  
1. OCT 2-5, 1922  
2. SEPT 30-OCT 1, 1971  
3. SEPT 24-26, 1920  
4. SEPT 22-23, 1937  
 
LATEST THE HIGH TEMPERATURE IN A YEAR OCCURRED: SEPT 15, 1927  
(99)  
 
THE HIGHEST TEMPERATURE IN 2017 HAS BEEN 94 ON JUNE 11 AND 12.  
 
FOR MORE, PLEASE SEE WEATHER.GOV/CHICAGO AND CLICK ON CLIMATE  
AND PAST WEATHER.  
 

 
 
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