Climatological Report (Daily)
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CDUS43 KLOT 210633
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
132 AM CDT SAT OCT 21 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 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         78    305 PM  86    1953  61     17       56
  MINIMUM         51    627 AM  24    1930  42      9       45
                                      1895
  AVERAGE         65                        51     14       51

PRECIPITATION (IN)
  YESTERDAY        0.00          1.65 1916   0.10  -0.10     0.00
  MONTH TO DATE    6.73                      2.00   4.73     1.67
  SINCE SEP 1      7.05                      5.21   1.84     3.43
  SINCE JAN 1     38.79                     30.34   8.45    30.41

SNOWFALL (IN)
  YESTERDAY        0.0           3.0  1952   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.1   -0.1      0.0
  SINCE SEP 1      0.0                       0.1   -0.1      0.0
  SINCE JUL 1      T                         0.1   -0.1      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                        14    -14       14
  MONTH TO DATE   58                       221   -163      107
  SINCE SEP 1     95                       326   -231      130
  SINCE JUL 1    100                       339   -239      130

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE   25                        10     15       24
  SINCE SEP 1    204                       102    102      189
  SINCE JAN 1    987                       842    145     1154
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    25   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED     9.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           500 AM
 LOWEST     35           200 PM
 AVERAGE    59

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   60        87      1953
 MINIMUM TEMPERATURE (F)   41        26      1952


SUNRISE AND SUNSET
OCTOBER 21 2017.......SUNRISE   711 AM CDT   SUNSET   600 PM CDT
OCTOBER 22 2017.......SUNRISE   713 AM CDT   SUNSET   559 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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