Climatological Report (Seasonal)
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CXUS53 KLOT 011612
CLSORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1009 AM CST FRI DEC 1 2017

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2017 TO 11/30/2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             101   09/02/1953
                        09/01/1953
 LOW               -2   11/24/1950
                        11/29/1872
HIGHEST            95   09/23        MM      MM       91
LOWEST             18   11/10        MM      MM       22
AVG. MAXIMUM     64.0              61.8     2.2     66.3
AVG. MINIMUM     47.1              43.2     3.9     49.2
MEAN             55.6              52.5     3.1     57.8
DAYS MAX >= 90      7
DAYS MAX <= 32      1
DAYS MIN <= 32     17
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        19.32   1961
 MINIMUM         2.07   1956
TOTALS          10.77              9.51    1.26
DAYS >= .01        22
DAYS >= .10        16
DAYS >= .50         6
DAYS >= 1.00        1

SNOWFALL (INCHES)
TOTALS            0.1               1.4    -1.3        T

DEGREE_DAYS
HEATING TOTAL    1038              1243    -205
 SINCE 7/1       1043              1256    -213
COOLING TOTAL     208               103     105
 SINCE 1/1        991               843     148
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              9.6
HIGHEST WIND SPEED/DIRECTION    38/320    DATE  10/14
HIGHEST GUST SPEED/DIRECTION    45/310    DATE  10/14


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN               10     RAIN                      13
LIGHT RAIN               28     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                2     SLEET                      1
FOG                      30     FOG W/VIS <= 1/4 MILE      1
HAZE                     38

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

$$



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