223  
CXUS53 KLSX 060133 CCB  
CLSSTL  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE ST LOUIS MO  
1100 AM CST FRI DEC 1 2017  
   
...............................
 
 
 
...THE ST. LOUIS CLIMATE SUMMARY FOR THE SEASON, FROM  
9/1/2017 TO 11/30/2017...  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1874 TO 2017  
 
WEATHER OBSERVED NORMAL DEPART  
VALUE DATE(S) VALUE FROM  
NORMAL    
............................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 104 09/01/2011  
09/01/1984  
09/04/1954  
LOW 1 11/30/1964  
HIGHEST 97 09/20  
LOWEST 24 11/22  
AVG. MAXIMUM 71.2 68.0 3.2  
AVG. MINIMUM 50.7 49.2 1.5  
MEAN 61.0 58.6 2.4  
DAYS MAX >= 90 9  
DAYS MAX <= 32 0  
DAYS MIN <= 32 11  
DAYS MIN <= 0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 21.50 1984  
MINIMUM 2.36 1875  
TOTALS 5.51 10.37 -4.86  
DAYS >= .01 23  
DAYS >= .10 11  
DAYS >= .50 4  
DAYS >= 1.00 1  
GREATEST  
24 HR. TOTAL 1.72 10/09 TO 10/09  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 11.3 1951  
24 HR TOTAL 7.7 11/26/1980 TO 11/27/1980  
TOTALS T 0.7 -0.7  
SINCE 7/1 T 0.7 -0.7  
DAYS >= TRACE 5  
DAYS >= 1.0 0  
GREATEST  
SNOW DEPTH 0  
24 HR TOTAL T 10/27 TO 10/27  
10/28 TO 10/28  
10/31 TO 10/31  
 
DEGREE_DAYS  
HEATING TOTAL 702 825 -123  
SINCE 7/1 702 826 -124  
COOLING TOTAL 357 247 110  
SINCE 1/1 1959 1646 313    
.............................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 8.3  
HIGHEST WIND SPEED/DIRECTION 32/310 DATE 11/18  
HIGHEST GUST SPEED/DIRECTION 49/320 DATE 11/18  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 7 HAIL 1  
FOG W/VIS <= 1/4 MILE 2  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
   
..SEASONAL
 
 
15TH WARMEST METEOROLOGICAL FALL ON RECORD (61.0 DEGREES).  
 
TIED 7TH MOST OCCURRENCES OF A MAXIMUM TEMPERATURE GREATER THAN OR  
EQUAL TO 70 DEGREES (57 DAYS).  
 
TIED 5TH LEAST OCCURRENCES OF AT LEAST A QUATER INCH OF PRECIPITATION  
(5 DAYS).  
   
..MONTHLY
 
 
7TH DRIEST SEPTEMBER ON RECORD (0.27 INCHES).  
   
..DAILY
 
 
4 RECORD HIGH TEMPERATURES SET OR TIED (9/20...9/22...9/25...AND 11/24).  
 
2 RECORD HIGH MINIMUM TEMPERATURES TIED (9/21 AND 9/26).  
 
1 RECORD RAINFALL VALUE SET (1.72 INCHES ON 10/09).  
 
4 SNOWFALL RECORDS TIED (10/27...10/28...10/31...AND 11/01).  
 

 
 
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