Climatological Report (Daily)
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CDUS43 KLOT 180637
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
137 AM CDT TUE APR 18 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 17 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         69   1141 AM  88    1976  60      9       79
  MINIMUM         44   1159 PM  17    1875  39      5       45
  AVERAGE         57                        50      7       62

PRECIPITATION (IN)
  YESTERDAY        0.00          2.01 2013   0.12  -0.12     0.00
  MONTH TO DATE    2.79                      1.87   0.92     0.69
  SINCE MAR 1      6.80                      4.37   2.43     4.03
  SINCE JAN 1     11.19                      7.89   3.30     6.10

SNOWFALL (IN)
  YESTERDAY        0.0           0.5  1949   0.0    0.0      0.0
  MONTH TO DATE    0.0                       1.0   -1.0      1.1
  SINCE MAR 1      7.8                       6.6    1.2      3.7
  SINCE JUL 1     26.1                      36.1   RRRR     31.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        8                        16     -8        3
  MONTH TO DATE  202                       318   -116      370
  SINCE MAR 1    987                      1159   -172     1035
  SINCE JUL 1   4912                      5893   -981     5043

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    9                         0      9        0
  SINCE MAR 1      9                         1      8        0
  SINCE JAN 1      9                         1      8        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION    NE (50)
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED     7.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    76           800 PM
 LOWEST     22          1100 AM
 AVERAGE    49

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   60        89      2002
 MINIMUM TEMPERATURE (F)   40        23      1983
                                             1875


SUNRISE AND SUNSET
APRIL 18 2017.........SUNRISE   606 AM CDT   SUNSET   736 PM CDT
APRIL 19 2017.........SUNRISE   605 AM CDT   SUNSET   737 PM CDT


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




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