Climatological Report (Daily)
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000
CDUS43 KLOT 140644
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
144 AM CDT THU SEP 14 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 13 2017...

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


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         77   1226 PM  98    1939  76      1       85
  MINIMUM         58   1217 AM  39    1890  56      2       65
  AVERAGE         68                        66      2       75

PRECIPITATION (IN)
  YESTERDAY        T             6.64 2008   0.11  -0.11      T
  MONTH TO DATE    0.25                      1.45  -1.20     0.45
  SINCE SEP 1      0.25                      1.45  -1.20     0.45
  SINCE JAN 1     31.99                     26.58   5.41    27.43

SNOWFALL (IN)
  YESTERDAY        0.0           0.0    MM   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.0    0.0      0.0
  SINCE SEP 1      0.0                       0.0    0.0      0.0
  SINCE JUL 1      T                         0.0    0.0      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         3     -3        0
  MONTH TO DATE   29                        20      9        1
  SINCE SEP 1     29                        20      9        1
  SINCE JUL 1     34                        33      1        1

 COOLING
  YESTERDAY        3                         3      0       10
  MONTH TO DATE   17                        60    -43       88
  SINCE SEP 1     17                        60    -43       88
  SINCE JAN 1    800                       800      0     1053
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION     E (100)
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION     E (100)
  AVERAGE WIND SPEED     6.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    90          1200 AM
 LOWEST     50          1200 PM
 AVERAGE    70

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        99      1939
 MINIMUM TEMPERATURE (F)   55        40      1985


SUNRISE AND SUNSET
SEPTEMBER 14 2017.....SUNRISE   631 AM CDT   SUNSET   702 PM CDT
SEPTEMBER 15 2017.....SUNRISE   632 AM CDT   SUNSET   701 PM CDT


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




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