277
CXUS53 KLOT 011831
CLAORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1231 PM CST WED JAN 01 2025

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE YEAR OF 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            105   07/24/1934
 LOW             -27   01/20/1985
HIGHEST           99   08/27                         100  08/24
LOWEST           -10   01/14                          -1  01/31
                       01/15
                                                          02/03
AVG. MAXIMUM    63.5               59.5     4.0     62.4
AVG. MINIMUM    46.5               43.0     3.5     45.7
MEAN            55.0               51.2     3.8     54.0
DAYS MAX >= 90    23               16.7     6.3       21
DAYS MAX <= 32    21               43.4   -22.4       16
DAYS MIN <= 32    85              121.3   -36.3       91
DAYS MIN <= 0      3                6.5    -3.5        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       50.86   2008
 MINIMUM       22.22   1962
TOTALS         34.92              37.86   -2.94    33.73
DAILY AVG.      0.09               0.10   -0.01     0.09
DAYS >= .01      125              125.8    -0.8      135
DAYS >= .10       74               71.6     2.4       76
DAYS >= .50       23               23.8    -0.8       20
DAYS >= 1.00       4                8.3    -4.3        7
GREATEST
 24 HR. TOTAL   3.14    07/13 TO 07/14              3.79

SNOWFALL (INCHES)
RECORDS
 TOTAL          95.3   1978
TOTALS          23.6               38.4   -14.8     19.8
SINCE 7/1        5.3                9.6    -4.3       MM
DAYS >= 1.0        9               11.4    -2.4        6
GREATEST
 SNOW DEPTH        5   01/13                           3  01/30
                       01/19
                                                          01/31
                                                          02/01
 24 HR TOTAL     5.7   01/12 TO 01/13                3.6

DEGREE DAYS
HEATING TOTAL   4793               5974   -1181     5014
 SINCE 7/1      1780               2220    -440       MM
COOLING TOTAL   1212               1003     209     1145
 SINCE 1/1      1212               1003     209       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.5
HIGHEST WIND SPEED/DIRECTION    43/290    DATE  07/15
HIGHEST GUST SPEED/DIRECTION    58/220    DATE  05/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.61
NUMBER OF DAYS FAIR           62
NUMBER OF DAYS PC            147
NUMBER OF DAYS CLOUDY        128

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             52     MIXED PRECIP               0
HEAVY RAIN               38     RAIN                      49
LIGHT RAIN              141     FREEZING RAIN              0
LT FREEZING RAIN          4     HAIL                       6
HEAVY SNOW                5     SNOW                       7
LIGHT SNOW               35     SLEET                      7
FOG                     142     FOG W/VIS <= 1/4 MILE     13
HAZE                     45

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

$$