Climatological Report (Daily)
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559
CDUS43 KLOT 172236
CLIORD


CLIMATE REPORT *snowfall as of noon.
NATIONAL WEATHER SERVICE CHICAGO IL
433 PM CST SAT FEB 17 2018


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR FEBRUARY 17 2018...
VALID TODAY AS OF 0400 PM LOCAL TIME.

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)
 TODAY
  MAXIMUM         35    301 PM  67    2017  36     -1       67
  MINIMUM         17    444 AM -11    1903  21     -4       27
  AVERAGE         26                        28     -2       47

PRECIPITATION (IN)
  TODAY            0.04          1.10 2008   0.06  -0.02     0.00
  MONTH TO DATE    1.66                      0.97   0.69     0.47
  SINCE DEC 1      3.79                      4.95  -1.16     5.11
  SINCE JAN 1      3.20                      2.70   0.50     3.34

SNOWFALL (IN)
  TODAY           0.0*            8.5  1893   0.4   MM        0.0
  MONTH TO DATE   18.3                       5.9   12.4       T
  SINCE DEC 1     28.2                      24.9    3.3     18.3
  SINCE JUL 1     28.3                      26.3    2.0     18.3

DEGREE DAYS
 HEATING
  TODAY           39                        37      2       18
  MONTH TO DATE  745                       662     83      557
  SINCE DEC 1   3155                      3096     59     2905
  SINCE JUL 1   4198                      4352   -154     3734

 COOLING
  TODAY            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    16   HIGHEST WIND DIRECTION    SW (220)
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED     7.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  SNOW
  LIGHT SNOW
  FOG
  FOG W/VISIBILITY <= 1/4 MILE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92           400 PM
 LOWEST     57           800 AM
 AVERAGE    75

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   36        70      2017
 MINIMUM TEMPERATURE (F)   21       -14      1936


SUNRISE AND SUNSET
FEBRUARY 17 2018......SUNRISE   645 AM CST   SUNSET   527 PM CST
FEBRUARY 18 2018......SUNRISE   643 AM CST   SUNSET   528 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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