Climatological Report (Daily)
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | 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 312239
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
439 PM CST SUN DEC 31 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 31 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         13    324 PM  68    1875  32    -19       40
  MINIMUM          0    105 AM -10    1967  17    -17       23
  AVERAGE          7                        24    -17       32

PRECIPITATION (IN)
  TODAY            0.00          0.89 1978   0.06  -0.06     0.00
  MONTH TO DATE    0.59                      2.25  -1.66     1.77
  SINCE DEC 1      0.59                      2.25  -1.66     1.77
  SINCE JAN 1     43.10                     36.89   6.21    35.97

SNOWFALL (IN)
  TODAY            0.0           7.6  1978   0.3   -0.3      0.0
  MONTH TO DATE    5.3                       8.2   -2.9     17.7
  SINCE DEC 1      5.3                       8.2   -2.9     17.7
  SINCE JUL 1      5.4                       9.6   -4.2     17.7

DEGREE DAYS
 HEATING
  TODAY           58                        40     18       33
  MONTH TO DATE 1164                      1153     11     1231
  SINCE DEC 1   1164                      1155      9     1231
  SINCE JUL 1   2207                      2411   -204     2060

 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    18   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    10.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    69           200 AM
 LOWEST     52           400 PM
 AVERAGE    61

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   32        65      1876
 MINIMUM TEMPERATURE (F)   17       -10      1969


SUNRISE AND SUNSET
DECEMBER 31 2017......SUNRISE   719 AM CST   SUNSET   430 PM CST
JANUARY  1 2018.......SUNRISE   720 AM CST   SUNSET   431 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.