Climatological Report (Monthly)
Issued by NWS

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CXUS53 KLOT 011320
CLMORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
820 AM CDT SUN OCT 01 2023

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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              29   09/23/1995
                       09/30/1984
                       09/28/1942
HIGHEST           94   09/03                          88  09/01
                       09/04
                       09/05
                                                          09/03
LOWEST            53   09/14                          44  09/29
                       09/18
AVG. MAXIMUM    77.7               75.5     2.2     76.0
AVG. MINIMUM    61.2               57.1     4.1     58.8
MEAN            69.5               66.3     3.2     67.4
DAYS MAX >= 90     3                1.6     1.4        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.1    -0.1        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       14.17   1961
 MINIMUM        0.01   1979
TOTALS          3.36               3.19    0.17     2.20
DAILY AVG.      0.11               0.11    0.00     0.07
DAYS >= .01       16                8.5     7.5        7
DAYS >= .10        5                5.6    -0.6        3
DAYS >= .50        2                1.9     0.1        1
DAYS >= 1.00       1                0.8     0.2        1
GREATEST
 24 HR. TOTAL   1.62   09/16 TO 09/17               1.45

DEGREE DAYS
HEATING TOTAL     13                 77     -64       75
 SINCE 7/1        15                 82     -67       MM
COOLING TOTAL    155                116      39      154
 SINCE 1/1      1089                988     101       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.5
HIGHEST WIND SPEED/DIRECTION    23/190    DATE  09/05
HIGHEST GUST SPEED/DIRECTION    32/190    DATE  09/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.62
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       3
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

NO RECORDS SET OR TIED IN SEPTEMBER 2023.

$$


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