Climatological Report (Daily)
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CDUS43 KLOT 170635
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1234 AM CST WED DEC 17 2014


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 16 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         45   1208 PM  60    1984  34     11       21
  MINIMUM         29   1159 PM -12    1951  20      9        7
  AVERAGE         37                        27     10       14

PRECIPITATION (IN)
  YESTERDAY        0.02          1.67 1921   0.07  -0.05     0.05
  MONTH TO DATE    0.28                      1.33  -1.05     0.69
  SINCE DEC 1      0.28                      1.33  -1.05     0.69
  SINCE JAN 1     38.96                     35.97   2.99    40.84

SNOWFALL (IN)
  YESTERDAY        0.0           4.8  2008   0.3   -0.3      0.7
  MONTH TO DATE    T                         3.8   -3.8      9.1
  SINCE DEC 1      T                         3.8   -3.8      9.1
  SINCE JUL 1      2.9                       5.2   -2.3     10.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       28                        38    -10       51
  MONTH TO DATE  503                       564    -61      672
  SINCE DEC 1    503                       564    -61      672
  SINCE JUL 1   1946                      1820    126     1955

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    799                       843    -44      933
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION    NW (300)
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED    12.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           200 AM
 LOWEST     69           800 PM
 AVERAGE    85

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   34        60      1977
 MINIMUM TEMPERATURE (F)   20        -7      1951


SUNRISE AND SUNSET
DECEMBER 17 2014......SUNRISE   714 AM CST   SUNSET   422 PM CST
DECEMBER 18 2014......SUNRISE   714 AM CST   SUNSET   422 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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