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CDUS43 KLOT 160635
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1235 AM CST MON DEC 16 2019


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...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 15 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2019


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         26    445 PM  64    1971  35     -9       46
  MINIMUM         19    803 AM -12    1901  21     -2       26
  AVERAGE         23                        28     -5       36

PRECIPITATION (IN)
  YESTERDAY        T             1.10 1971   0.07  -0.07     0.00
  MONTH TO DATE    0.16                      1.26  -1.10     1.52
  SINCE DEC 1      0.16                      1.26  -1.10     1.52
  SINCE JAN 1     48.15                     35.90  12.25    47.43

SNOWFALL (IN)
  YESTERDAY        T             8.0  1987   0.3   -0.3      0.0
  MONTH TO DATE    0.2                       3.5   -3.3      0.3
  SINCE DEC 1      0.2                       3.5   -3.3      0.3
  SINCE JUL 1      8.5                       4.9    3.6     13.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       42                        37      5       29
  MONTH TO DATE  493                       526    -33      507
  SINCE DEC 1    493                       526    -33      507
  SINCE JUL 1   1846                      1782     64     1870

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    960                       843    117     1290
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    21   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     6.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    77           800 AM
 LOWEST     62           200 AM
 AVERAGE    70

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   34        60      1984
 MINIMUM TEMPERATURE (F)   20       -12      1951


SUNRISE AND SUNSET
DECEMBER 16 2019......SUNRISE   713 AM CST   SUNSET   421 PM CST
DECEMBER 17 2019......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.




$$
National Weather Service National Headquarters
