Climatological Report (Annual)
Issued by NWS
Issued by NWS
000 CXUS53 KLOT 021750 CLAORD CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 1150 AM CST SAT JAN 02 2021 ................................... ...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE YEAR OF 2020... CLIMATE NORMAL PERIOD: 1981 TO 2010 CLIMATE RECORD PERIOD: 1871 TO 2021 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 105 07/24/1934 LOW -27 01/20/1985 HIGHEST 97 08/24 MM MM 95 07/20 LOWEST -2 02/14 MM MM -23 01/30 AVG. MAXIMUM 61.7 59.1 2.6 57.8 AVG. MINIMUM 44.9 40.8 4.1 41.4 MEAN 53.3 49.9 3.4 49.6 DAYS MAX >= 90 31 14.0 17.0 14 DAYS MAX <= 32 19 42.7 -23.7 50 DAYS MIN <= 32 103 121.8 -18.8 131 DAYS MIN <= 0 1 7.1 -6.1 7 PRECIPITATION (INCHES) RECORD MAXIMUM 50.86 2008 MINIMUM 22.22 1962 TOTALS 39.22 36.89 2.33 49.54 DAILY AVG. 0.11 0.10 0.01 0.14 DAYS >= .01 118 124.1 -6.1 151 DAYS >= .10 77 69.1 7.9 93 DAYS >= .50 22 22.7 -0.7 32 DAYS >= 1.00 7 8.3 -1.3 10 GREATEST 24 HR. TOTAL 3.53 05/14 TO 05/14 2.28 SNOWFALL (INCHES) RECORDS TOTAL 95.3 1978 24 HR TOTAL MM SNOW DEPTH 29 01/14/1979 TOTALS 28.0 36.3 -8.3 45.7 SINCE 7/1 3.5 9.6 -6.1 10.3 SNOW DEPTH AVG. 0 MM MM 0 DAYS >= TRACE 56 MM MM 65 DAYS >= 1.0 13 11.4 1.6 14 GREATEST SNOW DEPTH 3 03/23 10 02/15 02/14 02/13 24 HR TOTAL 3.1 01/17 TO 01/17 5.4 DEGREE DAYS HEATING TOTAL 5472 6339 -867 6429 SINCE 7/1 1989 2409 -420 MM COOLING TOTAL 1295 842 453 960 SINCE 1/1 1295 843 452 960 FREEZE DATES RECORD EARLIEST 09/22/1995 LATEST 05/25/1992 EARLIEST 10/28 LATEST 05/09 ................................................................ WIND (MPH) AVERAGE WIND SPEED 9.6 HIGHEST WIND SPEED/DIRECTION 40/270 DATE 08/10 40/060 07/07 40/330 06/26 HIGHEST GUST SPEED/DIRECTION 62/270 DATE 08/10 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.61 NUMBER OF DAYS FAIR 73 NUMBER OF DAYS PC 149 NUMBER OF DAYS CLOUDY 144 AVERAGE RH (PERCENT) 64 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 44 MIXED PRECIP 0 HEAVY RAIN 36 RAIN 54 LIGHT RAIN 137 FREEZING RAIN 1 LT FREEZING RAIN 7 HAIL 3 HEAVY SNOW 2 SNOW 13 LIGHT SNOW 54 SLEET 1 FOG 124 FOG W/VIS <= 1/4 MILE 8 HAZE 65 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$