000 CDUS43 KLOT 042238 CLIORD CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 437 PM CST THU DEC 4 2008 ................................... ...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 4 2008... VALID TODAY AS OF 0400 PM LOCAL TIME. 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) TODAY MAXIMUM 22 316 PM 66 1998 38 -16 33 MINIMUM 12 747 AM 0 1893 24 -12 22 AVERAGE 17 31 -14 28 PRECIPITATION (IN) TODAY 0.00 1.19 1973 0.09 -0.09 0.23 MONTH TO DATE 0.51 0.36 0.15 1.09 SINCE DEC 1 0.51 0.36 0.15 1.09 SINCE JAN 1 45.60 34.20 11.40 33.40 SNOWFALL (IN) TODAY 0.0 4.6 1964 0.2 -0.2 3.4 MONTH TO DATE 3.7 0.8 2.9 4.0 SINCE DEC 1 3.7 0.8 2.9 4.0 SINCE JUL 1 4.3 2.9 1.4 4.3 DEGREE DAYS HEATING TODAY 48 33 15 37 MONTH TO DATE 159 130 29 145 SINCE DEC 1 159 130 29 145 SINCE JUL 1 1365 1417 -52 1199 COOLING TODAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 828 830 -2 1111 .................................................................. WIND (MPH) HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (310) HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (330) AVERAGE WIND SPEED 10.4 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED TODAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 80 500 AM LOWEST 57 100 PM AVERAGE 69 .......................................................... THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 38 68 2001 MINIMUM TEMPERATURE (F) 24 4 2005 SUNRISE AND SUNSET DECEMBER 4 2008......SUNRISE 704 AM CST SUNSET 420 PM CST DECEMBER 5 2008......SUNRISE 704 AM CST SUNSET 420 PM CST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$