Climatological Report (Seasonal)
Issued by NWS

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CXUS53 KLOT 011912
CLSORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
112 PM CST FRI DEC 01 2023

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2023 TO 11/30/2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            101   09/02/1953
                       09/01/1953
 LOW              -2   11/24/1950
                       11/29/1872
HIGHEST           94   09/03                          88  09/01
                       09/04
                       09/05
                                                          09/03
LOWEST            14   11/28                          13  11/20
AVG. MAXIMUM    64.5               62.2     2.3     63.8
AVG. MINIMUM    48.5               45.5     3.0     46.0
MEAN            56.5               53.9     2.6     54.9
DAYS MAX >= 90     3                2.0     1.0        0
DAYS MAX <= 32     2                2.0     0.0        2
DAYS MIN <= 32    14               17.3    -3.3       13
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       19.32   1961
 MINIMUM        2.07   1956
TOTALS          6.50               9.04   -2.54     4.72
DAILY AVG.      0.07               0.10   -0.03     0.05
DAYS >= .01       38               29.0     9.0       21
DAYS >= .10       16               17.2    -1.2       10
DAYS >= .50        4                5.7    -1.7        2
DAYS >= 1.00       1                2.0    -1.0        1
GREATEST
 24 HR. TOTAL   1.62   09/16 TO 09/17               1.45

SNOWFALL (INCHES)
RECORDS
 TOTAL          14.8   1940
TOTALS           2.7                2.0     0.7      1.1
SINCE 7/1        2.7                2.0     0.7      4.3
DAYS >= 1.0        1                1.0     0.0        1
GREATEST
 SNOW DEPTH        1   11/26                           1  11/15
                       11/27
 24 HR TOTAL     1.8   11/26 TO 11/27                1.0

DEGREE DAYS
HEATING TOTAL    962               1145    -183     1065
 SINCE 7/1       964               1151    -187     2166
COOLING TOTAL    211                132      79      173
 SINCE 1/1      1145               1003     142     1174
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.7
HIGHEST WIND SPEED/DIRECTION    28/190    DATE  11/16
HIGHEST GUST SPEED/DIRECTION    41/180    DATE  11/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC             43
NUMBER OF DAYS CLOUDY         30

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                      11
LIGHT RAIN               37     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                4     SLEET                      0
FOG                      34     FOG W/VIS <= 1/4 MILE      1
HAZE                     10

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

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