641 CXUS53 KLOT 011728 CLSORD CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 1103 AM CST SUN MAR 1 2015 ................................... ...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM 12/1/2014 TO 2/28/2015... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2015 WEATHER OBSERVED NORMAL DEPART LAST YEAR'S VALUE DATE(S) VALUE FROM VALUE NORMAL ............................................................. TEMPERATURE (F) RECORD HIGH 75 02/27/1976 LOW -27 01/20/1985 HIGHEST 50 12/26 MM MM 56 12/14 LOWEST -10 02/28 MM MM -16 AVG. MAXIMUM 29.8 33.6 -3.8 27.1 AVG. MINIMUM 16.1 19.1 -3.0 10.4 MEAN 22.9 26.4 -3.5 18.8 DAYS MAX >= 90 0 DAYS MAX <= 32 48 DAYS MIN <= 32 83 DAYS MIN <= 0 15 PRECIPITATION (INCHES) RECORD MAXIMUM 13.79 1950 MINIMUM 1.60 1931 TOTALS 3.65 5.77 -2.12 DAYS >= .01 28 DAYS >= .10 11 DAYS >= .50 2 DAYS >= 1.00 0 SNOWFALL (INCHES) TOTALS 40.7 28.1 12.6 67.4 DEGREE_DAYS HEATING TOTAL 3737 3478 259 SINCE 7/1 5180 4734 446 COOLING TOTAL 0 0 0 SINCE 1/1 0 0 0 .............................................................. WIND (MPH) AVERAGE WIND SPEED 10.3 HIGHEST WIND SPEED/DIRECTION 38/330 DATE 02/14 HIGHEST GUST SPEED/DIRECTION 48/340 DATE 02/14 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 1 HEAVY RAIN 0 RAIN 1 LIGHT RAIN 15 FREEZING RAIN 0 LT FREEZING RAIN 7 HAIL 0 HEAVY SNOW 3 SNOW 9 LIGHT SNOW 43 SLEET 4 FOG 41 FOG W/VIS <= 1/4 MILE 3 HAZE 24 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$