Climatological Report (Daily)
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CDUS43 KLOT 300649
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
145 AM CDT SUN APR 30 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 29 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         46    924 AM  88    1970  64    -18       51
                                      1899
  MINIMUM         40    605 PM  31    2008  43     -3       41
                                      1958
  AVERAGE         43                        54    -11       46

PRECIPITATION (IN)
  YESTERDAY        1.95          2.75 1909   0.12   1.83     0.01
  MONTH TO DATE    5.11                      3.26   1.85     2.19
  SINCE MAR 1      9.12                      5.76   3.36     5.53
  SINCE JAN 1     13.51                      9.28   4.23     7.60

SNOWFALL (IN)
  YESTERDAY        0.0           T    1909   0.0    0.0      0.0
                                      1950
  MONTH TO DATE    0.0                       1.2   -1.2      1.1
  SINCE MAR 1      7.8                       6.8    1.0      3.7
  SINCE JUL 1     26.1                      36.3  -10.2     31.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       22                        12     10       19
  MONTH TO DATE  319                       482   -163      498
  SINCE MAR 1   1104                      1323   -219     1163
  SINCE JUL 1   5029                      6057  -1028     5171

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE   12                         0     12        7
  SINCE MAR 1     12                         1     11        7
  SINCE JAN 1     12                         1     11        7
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    32   HIGHEST WIND DIRECTION    NE (50)
  HIGHEST GUST SPEED    41   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED    18.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  THUNDERSTORM
  HEAVY RAIN
  RAIN
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           700 PM
 LOWEST     58           700 AM
 AVERAGE    76

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   65        91      1942
 MINIMUM TEMPERATURE (F)   44        30      1873


SUNRISE AND SUNSET
APRIL 30 2017.........SUNRISE   549 AM CDT   SUNSET   750 PM CDT
MAY  1 2017...........SUNRISE   547 AM CDT   SUNSET   751 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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