Climatological Report (Daily)
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000
CDUS43 KLOT 180635
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
134 AM CDT MON SEP 18 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 17 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         86    204 PM  93    1955  75     11       82
  MINIMUM         63   1159 PM  37    1984  54      9       62
  AVERAGE         75                        64     11       72

PRECIPITATION (IN)
  YESTERDAY        0.00          2.42 1927   0.10  -0.10     0.04
  MONTH TO DATE    0.25                      1.86  -1.61     0.59
  SINCE SEP 1      0.25                      1.86  -1.61     0.59
  SINCE JAN 1     31.99                     26.99   5.00    27.57

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                        32     -3        1
  SINCE SEP 1     29                        32     -3        1
  SINCE JUL 1     34                        45    -11        1

 COOLING
  YESTERDAY       10                         3      7        7
  MONTH TO DATE   54                        72    -18      112
  SINCE SEP 1     54                        72    -18      112
  SINCE JAN 1    837                       812     25     1077
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    21   HIGHEST GUST DIRECTION     W (270)
  AVERAGE WIND SPEED     7.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    78           500 AM
 LOWEST     44           200 PM
 AVERAGE    61

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   74        94      1955
 MINIMUM TEMPERATURE (F)   53        40      1903
                                             1901
                                             1889


SUNRISE AND SUNSET
SEPTEMBER 18 2017.....SUNRISE   635 AM CDT   SUNSET   655 PM CDT
SEPTEMBER 19 2017.....SUNRISE   636 AM CDT   SUNSET   654 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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