Climatological Report (Monthly)
Issued by NWS

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CXUS53 KLOT 011420
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
918 AM CDT WED OCT 1 2014

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014

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            88   09/05                         95  09/10
LOWEST             41   09/13                         46  09/23
AVG. MAXIMUM     73.7              74.8    -1.1     77.1
AVG. MINIMUM     54.2              54.3    -0.1     57.3
MEAN             63.9              64.6    -0.7     67.2
DAYS MAX >= 90      0               1.0    -1.0        3
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           2.71              3.21   -0.50     2.57
DAILY AVG.       0.09              0.11   -0.02     0.09
DAYS >= .01         9               8.3     0.7        7
DAYS >= .10         6               5.4     0.6        6
DAYS >= .50         2               2.0     0.0        3
DAYS >= 1.00        1               0.8     0.2        0
GREATEST
 24 HR. TOTAL    1.32   09/09 TO 09/10

DEGREE_DAYS
HEATING TOTAL     106               105       1       68
 SINCE 7/1        111               118      -7       79
COOLING TOTAL      81                92     -11      143
 SINCE 1/1        796               832     -36      908
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.5
HIGHEST WIND SPEED/DIRECTION    44/300    DATE  09/05
HIGHEST GUST SPEED/DIRECTION    52/300    DATE  09/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       3
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      7

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

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