Climatological Report (Daily)
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CDUS43 KLOT 212134
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
433 PM CDT THU SEP 21 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR SEPTEMBER 21 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

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)
 TODAY
  MAXIMUM         94R   258 PM  92    1970  73     21       74
  MINIMUM         72    556 AM  39    1991  52     20       65
                                      1983
                                      1889
  AVERAGE         83                        62     21       70

PRECIPITATION (IN)
  TODAY            0.00          1.67 1947   0.11  -0.11     0.55
  MONTH TO DATE    0.32                      2.29  -1.97     1.14
  SINCE SEP 1      0.32                      2.29  -1.97     1.14
  SINCE JAN 1     32.06                     27.42   4.64    28.12

SNOWFALL (IN)
  TODAY            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

DEGREE DAYS
 HEATING
  TODAY            0                         5     -5        0
  MONTH TO DATE   29                        49    -20        1
  SINCE SEP 1     29                        49    -20        1
  SINCE JUL 1     34                        62    -28        1

 COOLING
  TODAY           18                         2     16        5
  MONTH TO DATE   94                        80     14      138
  SINCE SEP 1     94                        80     14      138
  SINCE JAN 1    877                       820     57     1103
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION     S (190)
  AVERAGE WIND SPEED     5.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    79           500 AM
 LOWEST     33           200 PM
 AVERAGE    56

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   72        92      1956
 MINIMUM TEMPERATURE (F)   51        32      1995


SUNRISE AND SUNSET
SEPTEMBER 21 2017.....SUNRISE   638 AM CDT   SUNSET   650 PM CDT
SEPTEMBER 22 2017.....SUNRISE   639 AM CDT   SUNSET   648 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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