Climatological Report (Daily)
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CDUS43 KLOT 210638
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
138 AM CDT FRI APR 21 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 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         73    948 AM  87    1985  61     12       71
  MINIMUM         48   1234 AM  24    1897  40      8       51
  AVERAGE         61                        51     10       61

PRECIPITATION (IN)
  YESTERDAY        T             2.37 2000   0.11  -0.11     0.48
  MONTH TO DATE    2.80                      2.21   0.59     1.17
  SINCE MAR 1      6.81                      4.71   2.10     4.51
  SINCE JAN 1     11.20                      8.23   2.97     6.58

SNOWFALL (IN)
  YESTERDAY        0.0           0.2  1943   0.0    0.0      0.0
  MONTH TO DATE    0.0                       1.1   -1.1      1.1
  SINCE MAR 1      7.8                       6.7    1.1      3.7
  SINCE JUL 1     26.1                      36.2  -10.1     31.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        4                        15    -11        4
  MONTH TO DATE  219                       364   -145      387
  SINCE MAR 1   1004                      1205   -201     1052
  SINCE JUL 1   4929                      5939  -1010     5060

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


WIND (MPH)
  HIGHEST WIND SPEED    29   HIGHEST WIND DIRECTION     W (260)
  HIGHEST GUST SPEED    36   HIGHEST GUST DIRECTION     W (290)
  AVERAGE WIND SPEED    15.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           200 AM
 LOWEST     55           800 PM
 AVERAGE    69

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   61        88      1985
 MINIMUM TEMPERATURE (F)   41        27      1986


SUNRISE AND SUNSET
APRIL 21 2017.........SUNRISE   602 AM CDT   SUNSET   740 PM CDT
APRIL 22 2017.........SUNRISE   600 AM CDT   SUNSET   741 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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