582
CXUS53 KLOT 011154
CLMORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
554 AM CST THU JAN 01 2026

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025

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           56   12/28                          55  12/08
LOWEST            -2   12/14                           4  12/12
                                                          12/13
AVG. MAXIMUM    34.4               36.6    -2.2     38.4
AVG. MINIMUM    19.5               24.4    -4.9     25.7
MEAN            27.0               30.5    -3.5     32.0
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32    16               10.0     6.0        9
DAYS MIN <= 32    26               25.4     0.6       21
DAYS MIN <= 0      1                1.1    -0.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.56   1982
 MINIMUM        0.16   1896
TOTALS          2.07               2.11   -0.04     1.93
DAILY AVG.      0.07               0.07    0.00     0.06
DAYS >= .01       13               10.6     2.4        9
DAYS >= .10        5                4.8     0.2        4
DAYS >= .50        1                1.2    -0.2        1
DAYS >= 1.00       0                0.3    -0.3        0
GREATEST
 24 HR. TOTAL   0.98   12/27 TO 12/28               0.57

SNOWFALL (INCHES)
RECORDS
 TOTAL          33.3   1951
TOTALS           9.5                7.6     1.9      2.4
SINCE 7/1       19.9                9.6    10.3       MM
SNOWDEPTH AVG.     2                                   0
DAYS >= 1.0        3                2.0     1.0        1
GREATEST
 SNOW DEPTH        8   12/07                           2  12/20
                       12/08
                       12/09
                                                          12/21
 24 HR TOTAL     4.8   12/06 TO 12/07                2.2

DEGREE DAYS
HEATING TOTAL   1172               1069     103     1013
 SINCE 7/1      2141               2220     -79       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1      1215               1003     212       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.1
HIGHEST WIND SPEED/DIRECTION    33/260    DATE  12/29
HIGHEST GUST SPEED/DIRECTION    52/270    DATE  12/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.78
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY         22

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       2
LIGHT SNOW               16     SLEET                      1
FOG                      16     FOG W/VIS <= 1/4 MILE      2
HAZE                      4

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

$$