Climatological Report (Daily)
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000
CDUS43 KLOT 210644
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1242 AM CST SAT JAN 21 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 20 2017...

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)
 YESTERDAY
  MAXIMUM         43   1137 PM  63    1906  31     12       23
  MINIMUM         38    806 AM -27    1985  16     22       12
  AVERAGE         41                        23     18       18

PRECIPITATION (IN)
  YESTERDAY        0.18          1.13 1898   0.06   0.12     0.05
  MONTH TO DATE    2.73                      1.18   1.55     0.65
  SINCE DEC 1      4.50                      3.43   1.07     5.52
  SINCE JAN 1      2.73                      1.18   1.55     0.65

SNOWFALL (IN)
  YESTERDAY        0.0           8.0  1886   0.4   -0.4      0.9
  MONTH TO DATE    0.4                       6.8   -6.4      5.9
  SINCE DEC 1     18.1                      15.0    3.1     10.4
  SINCE JUL 1     18.1                      16.4    1.7     21.6
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       24                        42    -18       47
  MONTH TO DATE  782                       826    -44      860
  SINCE DEC 1   2013                      1981     32     1660
  SINCE JUL 1   2842                      3237   -395     2633

 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    13   HIGHEST WIND DIRECTION    NE (60)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION    NE (50)
  AVERAGE WIND SPEED     5.8


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          1200 AM
 LOWEST     92           300 AM
 AVERAGE    96

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   31        62      1906
 MINIMUM TEMPERATURE (F)   16       -22      1984


SUNRISE AND SUNSET
JANUARY 21 2017.......SUNRISE   713 AM CST   SUNSET   453 PM CST
JANUARY 22 2017.......SUNRISE   713 AM CST   SUNSET   454 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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