Climatological Report (Monthly) Issued by NWS
000
CXUS53 KLOT 032309 CCA
CLMORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1158 AM CST MON JAN 01 2024
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...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 71 12/02/1982
12/03/1970
LOW -25 12/24/1983
HIGHEST 59 12/25 59 12/29
LOWEST 17 12/19 -8 12/23
AVG. MAXIMUM 44.2 36.6 7.6 35.7
AVG. MINIMUM 33.8 24.4 9.4 22.5
MEAN 39.0 30.5 8.5 29.1
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 10.0 -10.0 10
DAYS MIN <= 32 16 25.4 -9.4 21
DAYS MIN <= 0 0 1.1 -1.1 3
PRECIPITATION (INCHES)
RECORD
MAXIMUM 8.56 1982
MINIMUM 0.16 1896
TOTALS 2.97 2.11 0.86 2.16
DAILY AVG. 0.10 0.07 0.03 0.07
DAYS >= .01 12 10.6 1.4 7
DAYS >= .10 9 4.8 4.2 3
DAYS >= .50 2 1.2 0.8 1
DAYS >= 1.00 0 0.3 -0.3 1
GREATEST
24 HR. TOTAL 0.66 12/01 TO 12/01 1.51
SNOWFALL (INCHES)
RECORDS
TOTAL 33.3 1951
TOTALS 1.2 7.6 -6.4 3.2
SINCE 7/1 3.9 9.6 -5.7 MM
SNOWDEPTH AVG. 0 0
DAYS >= 1.0 0 2.0 -2.0 2
GREATEST
SNOW DEPTH 0 1 12/26
12/27
12/28
24 HR TOTAL 0.9 12/31 TO 12/31 1.3
DEGREE DAYS
HEATING TOTAL 798 1069 -271 1101
SINCE 7/1 1762 2220 -458 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 1145 1003 142 MM
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WIND (MPH)
AVERAGE WIND SPEED 8.6
HIGHEST WIND SPEED/DIRECTION 29/320 DATE 12/18
HIGHEST GUST SPEED/DIRECTION 41/260 DATE 12/09
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.77
NUMBER OF DAYS FAIR 3
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 19
AVERAGE RH (PERCENT) 76
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 5
LIGHT RAIN 17 FREEZING RAIN 0
LT FREEZING RAIN 1 HAIL 1
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 5 SLEET 0
FOG 16 FOG W/VIS <= 1/4 MILE 2
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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