248 CDUS43 KLOT 170631 CLICHI CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 130 AM CDT SAT MAY 17 2008 ................................... ...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 16 2008... CLIMATE NORMAL PERIOD 1971 TO 2000 CLIMATE RECORD PERIOD 1871 TO 2008 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL .................................................................. TEMPERATURE (F) YESTERDAY MAXIMUM 73 323 PM 94 1962 70 3 66 MINIMUM 40 315 AM 33 1997 47 -7 44 AVERAGE 57 59 -2 55 PRECIPITATION (IN) YESTERDAY 0.00 1.38 1974 0.10 -0.10 0.14 MONTH TO DATE 3.09 1.75 1.34 0.65 SINCE MAR 1 8.44 8.08 0.36 7.80 SINCE JAN 1 13.90 11.46 2.44 11.13 SNOWFALL (IN) YESTERDAY 0.0 0.0 MM 0.0 0.0 0.0 MONTH TO DATE 0.0 T 0.0 0.0 SINCE MAR 1 7.9 7.6 0.3 5.3 SINCE JUL 1 60.3 38.0 22.3 35.6 DEGREE DAYS HEATING YESTERDAY 8 7 1 10 MONTH TO DATE 156 152 4 74 SINCE MAR 1 1543 1523 20 1314 SINCE JUL 1 6234 6369 -135 5996 COOLING YESTERDAY 0 1 -1 0 MONTH TO DATE 0 16 -16 26 SINCE MAR 1 0 26 -26 35 SINCE JAN 1 0 26 -26 35 .................................................................. WIND (MPH) HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION W (250) HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION SW (240) AVERAGE WIND SPEED 9.4 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.4 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 86 200 AM LOWEST 31 500 PM AVERAGE 59 .......................................................... THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 70 94 1962 MINIMUM TEMPERATURE (F) 48 36 2002 1973 SUNRISE AND SUNSET MAY 17 2008...........SUNRISE 529 AM CDT SUNSET 808 PM CDT MAY 18 2008...........SUNRISE 528 AM CDT SUNSET 809 PM CDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$