Climatological Report (Daily)
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000
CDUS43 KLOT 180634
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1233 AM CST THU JAN 18 2018


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 17 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         20    454 PM  60    1894  31    -11       39
  MINIMUM          4    640 AM -23    1982  16    -12       35
  AVERAGE         12                        23    -11       37

PRECIPITATION (IN)
  YESTERDAY        0.00          0.70 1910   0.06  -0.06     0.48
  MONTH TO DATE    0.63                      1.02  -0.39     2.09
  SINCE DEC 1      1.22                      3.27  -2.05     3.86
  SINCE JAN 1      0.63                      1.02  -0.39     2.09

SNOWFALL (IN)
  YESTERDAY        0.0           4.9  1970   0.4   -0.4      0.0
  MONTH TO DATE    3.8                       5.7   -1.9      0.4
  SINCE DEC 1      9.1                      13.9   -4.8     18.1
  SINCE JUL 1      9.2                      15.3   -6.1     18.1
  SNOW DEPTH       3

DEGREE DAYS
 HEATING
  YESTERDAY       53                        42     11       28
  MONTH TO DATE  818                       700    118      697
  SINCE DEC 1   1983                      1855    128     1928
  SINCE JUL 1   3026                      3111    -85     2757

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    25   HIGHEST WIND DIRECTION    SW (240)
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION    SW (240)
  AVERAGE WIND SPEED    12.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    87           600 AM
 LOWEST     62           100 PM
 AVERAGE    75

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   31        61      1996
 MINIMUM TEMPERATURE (F)   16       -21      1994


SUNRISE AND SUNSET
JANUARY 18 2018.......SUNRISE   715 AM CST   SUNSET   449 PM CST
JANUARY 19 2018.......SUNRISE   715 AM CST   SUNSET   450 PM CST


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




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