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Climatological Report (Monthly)
Issued by NWS
Issued by NWS
000
CXUS53 KLOT 011259
CLMORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
645 AM CST TUE JAN 1 2013
...................................
...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2012...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2012
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 71 12/02/1982
12/03/1970
LOW -25 12/24/1983
HIGHEST 70 12/03 35 35 57 12/15
LOWEST 14 12/30 20 -6 12 12/10
AVG. MAXIMUM 42.5 34.8 7.7 41.8
AVG. MINIMUM 29.7 20.7 9.0 28.6
MEAN 36.1 27.7 8.4 35.2
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 3 11.4 -8.4 4
DAYS MIN <= 32 22 26.0 -4.0 22
DAYS MIN <= 0 0 1.5 -1.5 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 8.56 1982
MINIMUM 0.16 1896
TOTALS 2.21 2.25 -0.04 2.65
DAILY AVG. 0.07 0.07 0.00 0.09
DAYS >= .01 10 11.0 -1.0 15
DAYS >= .10 4 5.0 -1.0 3
DAYS >= .50 1 1.2 -0.2 1
DAYS >= 1.00 1 0.3 0.7 1
GREATEST
24 HR. TOTAL 1.32 12/19 TO 12/20
SNOWFALL (INCHES)
RECORDS
TOTAL 33.3 1951
TOTALS 0.9 8.2 -7.3 1.7
SINCE 7/1 0.9 9.6 -8.7 1.7
SNOWDEPTH AVG. 0 2 -2 0
DAYS >= 1.0 0 2.5 -2.5 1
GREATEST
SNOW DEPTH T 12/21 1 12/09
24 HR TOTAL 0.3 12/28 TO 12/28
DEGREE_DAYS
HEATING TOTAL 887 1155 -268 916
SINCE 7/1 2137 2411 -274 1979
COOLING TOTAL 0 0 0 0
SINCE 1/1 1324 843 481 1036
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 10.2
HIGHEST WIND SPEED/DIRECTION 36/310 DATE 12/21
HIGHEST GUST SPEED/DIRECTION 45/320 DATE 12/20
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.80
NUMBER OF DAYS FAIR 2
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 20
AVERAGE RH (PERCENT) 77
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 1
HEAVY RAIN 2 RAIN 4
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 12 SLEET 0
FOG 17 FOG W/VIS <= 1/4 MILE 3
HAZE 10
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
NO RECORDS SET FOR DECEMBER
$$
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