These data are preliminary and have not undergone final quality control by the National Climatic Data Center (NCDC). Therefore, these data are subject to revision. Final and certified climate data can be accessed at the NCDC - http://www.ncdc.noaa.gov.

Climatological Report (Daily)


000
CDUS43 KLOT 272146
CLIORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
446 PM CDT TUE APR 27 2021

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 27 2021...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1871 TO 2021


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         86   2:56 PM  87    1986  64     22       68
  MINIMUM         65   6:20 AM  29    1945  43     22       40
  AVERAGE         76                        53     23       54

PRECIPITATION (IN)
  TODAY            0.00          2.13 1959   0.12  -0.12     0.16
  MONTH TO DATE    0.63                      3.02  -2.39     1.49
  SINCE MAR 1      1.88                      5.52  -3.64     4.97
  SINCE JAN 1      5.08                      9.04  -3.96     8.54

SNOWFALL (IN)
  TODAY            0.0           2.5  2019   0.0    0.0      0.0
  MONTH TO DATE    T                         1.2   -1.2      4.7
  SINCE MAR 1      1.8                       6.8   -5.0      7.9
  SINCE JUL 1     48.8                      36.3   12.5     34.8

DEGREE DAYS
 HEATING
  TODAY            0                        12    -12       11
  MONTH TO DATE  365                       458    -93      460
  SINCE MAR 1   1003                      1299   -296     1140
  SINCE JUL 1   5343                      6033   -690     5526

 COOLING
  TODAY           11                         0     11        0
  MONTH TO DATE   25                         0     25        1
  SINCE MAR 1     25                         1     24        1
  SINCE JAN 1     25                         1     24        1
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     S (200)
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED    15.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    61           5:00 AM
 LOWEST     37           3:00 PM
 AVERAGE    49

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   64        86      1915
 MINIMUM TEMPERATURE (F)   43        28      1992


SUNRISE AND SUNSET
APRIL 27 2021.........SUNRISE   5:53 AM CDT   SUNSET   7:46 PM CDT
APRIL 28 2021.........SUNRISE   5:51 AM CDT   SUNSET   7:47 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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