Climatological Report (Daily)
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000
CDUS43 KLOT 212136
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
435 PM CDT SAT OCT 21 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR OCTOBER 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         77    241 PM  87    1953  60     17       54
  MINIMUM         60    518 AM  26    1952  41     19       37
  AVERAGE         69                        51     18       46

PRECIPITATION (IN)
  TODAY            0.00          2.28 1933   0.10  -0.10     0.00
  MONTH TO DATE    6.73                      2.10   4.63     1.67
  SINCE SEP 1      7.05                      5.31   1.74     3.43
  SINCE JAN 1     38.79                     30.44   8.35    30.41

SNOWFALL (IN)
  TODAY            0.0           1.9  1913   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.1   -0.1      0.0
  SINCE SEP 1      0.0                       0.1   -0.1      0.0
  SINCE JUL 1      T                         0.1   -0.1      0.0

DEGREE DAYS
 HEATING
  TODAY            0                        14    -14       19
  MONTH TO DATE   58                       235   -177      126
  SINCE SEP 1     95                       340   -245      149
  SINCE JUL 1    100                       353   -253      149

 COOLING
  TODAY            4                         0      4        0
  MONTH TO DATE   29                        10     19       24
  SINCE SEP 1    208                       102    106      189
  SINCE JAN 1    991                       842    149     1154
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    31   HIGHEST GUST DIRECTION     S (190)
  AVERAGE WIND SPEED    13.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    64           500 AM
 LOWEST     50           100 PM
 AVERAGE    57

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   60        87      1953
 MINIMUM TEMPERATURE (F)   41        22      1982


SUNRISE AND SUNSET
OCTOBER 21 2017.......SUNRISE   711 AM CDT   SUNSET   600 PM CDT
OCTOBER 22 2017.......SUNRISE   712 AM CDT   SUNSET   559 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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