Climatological Report (Monthly)
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CXUS53 KLOT 021718 CCA
CLMORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
904 AM CST SUN JAN 01 2023

...................................

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2022...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2022

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           59   12/29                          66  12/15
                                                          12/16
LOWEST            -8   12/23                          13  12/07
AVG. MAXIMUM    35.7               36.6    -0.9     45.8
AVG. MINIMUM    22.5               24.4    -1.9     30.2
MEAN            29.1               30.5    -1.4     38.0
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32    10               10.4    -0.4        2
DAYS MIN <= 32    21               25.4    -4.4       22
DAYS MIN <= 0      3                1.1     1.9        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.56   1982
 MINIMUM        0.16   1896
TOTALS          2.16               2.11    0.05     2.30
DAILY AVG.      0.07               0.07    0.00     0.07
DAYS >= .01        7               10.6    -3.6        9
DAYS >= .10        3                4.8    -1.8        5
DAYS >= .50        1                1.2    -0.2        1
DAYS >= 1.00       1                0.3     0.7        0
GREATEST
 24 HR. TOTAL   1.51   12/14 TO 12/15               0.84

SNOWFALL (INCHES)
RECORDS
 TOTAL          33.3   1951
TOTALS           3.2                7.6    -4.4      1.9
SINCE 7/1        4.3                9.6    -5.3       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        2                2.2    -0.2        1
GREATEST
 SNOW DEPTH        1   12/26                           1  12/29
                       12/27
                       12/28
 24 HR TOTAL     1.3   12/16 TO 12/16                1.5

DEGREE DAYS
HEATING TOTAL   1101               1069      32      831
 SINCE 7/1      2166               2220     -54       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1      1174               1003     171       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.6
HIGHEST WIND SPEED/DIRECTION    32/270    DATE  12/23
HIGHEST GUST SPEED/DIRECTION    50/280    DATE  12/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.78
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY         23

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                9     SLEET                      1
FOG                      13     FOG W/VIS <= 1/4 MILE      1
HAZE                      7

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

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