Climatological Report (Daily)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
CDUS43 KLOT 122247
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
446 PM CST TUE DEC 12 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 12 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         31   1218 AM  61    1877  35     -4       32
  MINIMUM         17    807 AM  -8    2000  21     -4        7
  AVERAGE         24                        28     -4       20

PRECIPITATION (IN)
  TODAY            0.01          1.76 1972   0.07  -0.06     0.00
  MONTH TO DATE    0.29                      1.04  -0.75     1.07
  SINCE DEC 1      0.29                      1.04  -0.75     1.07
  SINCE JAN 1     42.80                     35.68   7.12    35.27

SNOWFALL (IN)
  TODAY            T            11.0  1903   0.3   -0.3      0.0
  MONTH TO DATE    2.0                       2.7   -0.7     14.2
  SINCE DEC 1      2.0                       2.7   -0.7     14.2
  SINCE JUL 1      2.1                       4.1   -2.0     14.2

DEGREE DAYS
 HEATING
  TODAY           41                        37      4       45
  MONTH TO DATE  368                       415    -47      440
  SINCE DEC 1    368                       415    -47      440
  SINCE JUL 1   1411                      1671   -260     1269

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    991                       843    148     1157
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    30   HIGHEST WIND DIRECTION     N (350)
  HIGHEST GUST SPEED    36   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED    16.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    63          1200 AM
 LOWEST     52           100 PM
 AVERAGE    58

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   35        67      1975
 MINIMUM TEMPERATURE (F)   21       -13      1903


SUNRISE AND SUNSET
DECEMBER 12 2017......SUNRISE   710 AM CST   SUNSET   420 PM CST
DECEMBER 13 2017......SUNRISE   711 AM CST   SUNSET   421 PM CST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




$$





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.