Climatological Report (Monthly)
Issued by NWS

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CXUS53 KLOT 020016 CCB
CLMORD

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO IL
716 PM CDT FRI OCT 01 2021

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2021

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           89   09/17         MM      MM       88  09/02
                       09/19                              09/03
LOWEST            50   09/25         MM      MM       46  09/19
                                                          09/29
AVG. MAXIMUM    79.8               75.5     4.3     74.6
AVG. MINIMUM    60.7               57.1     3.6     57.9
MEAN            70.3               66.3     4.0     66.3
DAYS MAX >= 90     0                1.6    -1.6        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          1.23               3.19   -1.96     3.18
DAILY AVG.      0.04               0.11   -0.07     0.11
DAYS >= .01        6                8.5    -2.5       12
DAYS >= .10        4                5.6    -1.6        9
DAYS >= .50        0                1.9    -1.9        3
DAYS >= 1.00       0                0.8    -0.8        0
GREATEST
 24 HR. TOTAL   0.45   09/17 TO 09/17               0.64  09/08 TO 09/08

DEGREE DAYS
HEATING TOTAL     16                 77     -61       58
 SINCE 7/1        16                 82     -66       58
COOLING TOTAL    183                116      67      104
 SINCE 1/1      1257                988     269     1286
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
HIGHEST WIND SPEED/DIRECTION    28/360    DATE  09/22
HIGHEST GUST SPEED/DIRECTION    42/200    DATE  09/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.47
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          6


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

$$


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