Climatological Report (Daily)
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391
CDUS43 KLOT 202132
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
431 PM CDT FRI OCT 20 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR OCTOBER 20 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

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)
 TODAY
  MAXIMUM         78    259 PM  86    1953  61     17       56
  MINIMUM         51    627 AM  24    1930  42      9       45
                                      1895
  AVERAGE         65                        51     14       51

PRECIPITATION (IN)
  TODAY            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)
  TODAY            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

DEGREE DAYS
 HEATING
  TODAY            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
  TODAY            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    18   HIGHEST WIND DIRECTION    SW (210)
  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED     7.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


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

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


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


SUNRISE AND SUNSET
OCTOBER 20 2017.......SUNRISE   710 AM CDT   SUNSET   602 PM CDT
OCTOBER 21 2017.......SUNRISE   711 AM CDT   SUNSET   600 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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