315
CXUS53 KLOT 011636
CLMORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1036 AM CST WED JAN 01 2025

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2024...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2024

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           55   12/08                          59  12/25
LOWEST             4   12/12                          17  12/19
                       12/13
AVG. MAXIMUM    38.4               36.6     1.8     44.2
AVG. MINIMUM    25.7               24.4     1.3     33.8
MEAN            32.0               30.5     1.5     39.0
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     9               10.0    -1.0        0
DAYS MIN <= 32    21               25.4    -4.4       16
DAYS MIN <= 0      0                1.1    -1.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.56   1982
 MINIMUM        0.16   1896
TOTALS          1.93               2.11   -0.18     2.97
DAILY AVG.      0.06               0.07   -0.01     0.10
DAYS >= .01        9               10.6    -1.6       12
DAYS >= .10        4                4.8    -0.8        9
DAYS >= .50        1                1.2    -0.2        2
DAYS >= 1.00       0                0.3    -0.3        0
GREATEST
 24 HR. TOTAL   0.57   12/31 TO 12/31               0.66

SNOWFALL (INCHES)
RECORDS
 TOTAL          33.3   1951
TOTALS           2.4                7.6    -5.2      1.2
SINCE 7/1        5.3                9.6    -4.3       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        1                2.0    -1.0        0
GREATEST
 SNOW DEPTH        2   12/20                           0  MM
                       12/21
 24 HR TOTAL     2.2   12/19 TO 12/20                0.9

DEGREE DAYS
HEATING TOTAL   1013               1069     -56      798
 SINCE 7/1      1780               2220    -440       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1      1212               1003     209       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.9
HIGHEST WIND SPEED/DIRECTION    35/290    DATE  12/04
HIGHEST GUST SPEED/DIRECTION    51/280    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.75
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         18

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                1     SNOW                       1
LIGHT SNOW                6     SLEET                      1
FOG                      16     FOG W/VIS <= 1/4 MILE      3
HAZE                      3

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

$$