577
CXUS53 KLOT 011547
CLAORD

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

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE YEAR OF 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            105   07/24/1934
 LOW             -27   01/20/1985
HIGHEST           95   07/03                          99  08/27
                       08/09
                       08/16
LOWEST            -8   01/21                         -10  01/14
                                                          01/15
AVG. MAXIMUM    60.5               59.5     1.0     63.5
AVG. MINIMUM    43.6               43.0     0.6     46.5
MEAN            52.1               51.2     0.9     55.0
DAYS MAX >= 90    27               16.7    10.3       23
DAYS MAX <= 32    51               43.4     7.6       21
DAYS MIN <= 32   100              121.3   -21.3       85
DAYS MIN <= 0      6                6.5    -0.5        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       50.86   2008
 MINIMUM       22.22   1962
TOTALS         29.79              37.86   -8.07    34.92
DAILY AVG.      0.08               0.10   -0.02     0.09
DAYS >= .01      108              125.8   -17.8      125
DAYS >= .10       55               71.6   -16.6       74
DAYS >= .50       18               23.8    -5.8       23
DAYS >= 1.00       6                8.3    -2.3        4
GREATEST
 24 HR. TOTAL   2.28   08/16 TO 08/17               3.14

SNOWFALL (INCHES)
RECORDS
 TOTAL          95.3   1978
TOTALS          32.2               38.4    -6.2     23.6
SINCE 7/1       19.9                9.6    10.3      5.3
DAYS >= 1.0       10               11.4    -1.4        9
GREATEST
 SNOW DEPTH        8   12/07                           5  01/13
                       12/08
                       12/09
                                                          01/19
 24 HR TOTAL     8.4   11/29 TO 11/29                5.7

DEGREE DAYS
HEATING TOTAL   5802               5974    -172     4793
 SINCE 7/1      2141               2220     -79     1780
COOLING TOTAL   1215               1003     212     1212
 SINCE 1/1      1215               1003     212     1212
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.5
HIGHEST WIND SPEED/DIRECTION    41/230    DATE  07/16
HIGHEST GUST SPEED/DIRECTION    67/230    DATE  07/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.61
NUMBER OF DAYS FAIR           68
NUMBER OF DAYS PC            175
NUMBER OF DAYS CLOUDY        122

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             46     MIXED PRECIP               0
HEAVY RAIN               26     RAIN                      40
LIGHT RAIN              119     FREEZING RAIN              0
LT FREEZING RAIN          5     HAIL                       5
HEAVY SNOW                5     SNOW                       8
LIGHT SNOW               57     SLEET                      4
FOG                     135     FOG W/VIS <= 1/4 MILE      8
HAZE                     49

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

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