Climatological Report (Daily)
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CDUS43 KLOT 120633
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT WED APR 12 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 11 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         54    313 PM  90    1930  57     -3       51
  MINIMUM         41   1243 AM  25    1989  37      4       36
                                      1973
                                      1882
  AVERAGE         48                        47      1       44

PRECIPITATION (IN)
  YESTERDAY        T             2.41 1871   0.12  -0.12     0.00
  MONTH TO DATE    1.86                      1.19   0.67     0.69
  SINCE MAR 1      5.87                      3.69   2.18     4.03
  SINCE JAN 1     10.26                      7.21   3.05     6.10

SNOWFALL (IN)
  YESTERDAY        0.0           3.0  2007   0.1   -0.1      0.0
  MONTH TO DATE    0.0                       0.8   -0.8      1.1
  SINCE MAR 1      7.8                       6.4    1.4      3.7
  SINCE JUL 1     26.1                      35.9   -9.8     31.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       17                        18     -1       21
  MONTH TO DATE  155                       217    -62      289
  SINCE MAR 1    940                      1058   -118      954
  SINCE JUL 1   4865                      5792   -927     4962

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    2                         0      2        0
  SINCE MAR 1      2                         1      1        0
  SINCE JAN 1      2                         1      1        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION    NW (300)
  HIGHEST GUST SPEED    24   HIGHEST GUST DIRECTION    NW (300)
  AVERAGE WIND SPEED     9.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           300 AM
 LOWEST     54           400 PM
 AVERAGE    77

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   58        86      1977
                                             1971
 MINIMUM TEMPERATURE (F)   38        21      1957
                                             1939


SUNRISE AND SUNSET
APRIL 12 2017.........SUNRISE   616 AM CDT   SUNSET   730 PM CDT
APRIL 13 2017.........SUNRISE   614 AM CDT   SUNSET   731 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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