Climatological Report (Daily)
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146
CDUS43 KLOT 180637
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
135 AM CDT THU MAY 18 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 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         84    410 PM  94    1962  70     14       57
  MINIMUM         62   1046 PM  36    2002  49     13       44
                                      1973
  AVERAGE         73                        59     14       51

PRECIPITATION (IN)
  YESTERDAY        0.37          1.38 1986   0.12   0.25      T
                                      1969
  MONTH TO DATE    1.62                      1.99  -0.37     3.66
  SINCE MAR 1     12.06                      7.87   4.19     9.80
  SINCE JAN 1     16.45                     11.39   5.06    11.87

SNOWFALL (IN)
  YESTERDAY        0.0           0.0    MM   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.0    0.0      0.0
  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        0                         7     -7       14
  MONTH TO DATE  172                       151     21      192
  SINCE MAR 1   1296                      1484   -188     1374
  SINCE JUL 1   5221                      6218   -997     5382

 COOLING
  YESTERDAY        8                         1      7        0
  MONTH TO DATE   18                        15      3        0
  SINCE MAR 1     30                        25      5        7
  SINCE JAN 1     30                        25      5        7
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    39   HIGHEST WIND DIRECTION     W (260)
  HIGHEST GUST SPEED    50   HIGHEST GUST DIRECTION     W (260)
  AVERAGE WIND SPEED    20.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    84          1100 PM
 LOWEST     37           400 PM
 AVERAGE    61

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   71        93      1962
 MINIMUM TEMPERATURE (F)   49        34      2002


SUNRISE AND SUNSET
MAY 18 2017...........SUNRISE   528 AM CDT   SUNSET   808 PM CDT
MAY 19 2017...........SUNRISE   527 AM CDT   SUNSET   809 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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