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 222138
CLIORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
438 PM CDT THU APR 22 2021

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 22 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         59   2:55 PM  91    1980  62     -3       63
  MINIMUM         32   5:46 AM  24    1986  41     -9       40
  AVERAGE         46                        51     -5       52

PRECIPITATION (IN)
  TODAY            0.00          1.55 1981   0.12  -0.12     0.06
  MONTH TO DATE    0.63                      2.44  -1.81     1.14
  SINCE MAR 1      1.88                      4.94  -3.06     4.62
  SINCE JAN 1      5.08                      8.46  -3.38     8.19

SNOWFALL (IN)
  TODAY            0.0           0.2  1893   0.0    0.0      0.0
  MONTH TO DATE    T                         1.1   -1.1      4.7
  SINCE MAR 1      1.8                       6.7   -4.9      7.9
  SINCE JUL 1     48.8                      36.2   12.6     34.8

DEGREE DAYS
 HEATING
  TODAY           19                        14      5       13
  MONTH TO DATE  315                       393    -78      381
  SINCE MAR 1    953                      1234   -281     1061
  SINCE JUL 1   5293                      5968   -675     5447

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE   14                         0     14        1
  SINCE MAR 1     14                         1     13        1
  SINCE JAN 1     14                         1     13        1
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     W (260)
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION    SW (240)
  AVERAGE WIND SPEED     7.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    81           3:00 AM
 LOWEST     28           3:00 PM
 AVERAGE    55

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   62        88      1960
 MINIMUM TEMPERATURE (F)   41        25      1873
                                             1986


SUNRISE AND SUNSET
APRIL 22 2021.........SUNRISE   6:00 AM CDT   SUNSET   7:41 PM CDT
APRIL 23 2021.........SUNRISE   5:58 AM CDT   SUNSET   7:42 PM CDT


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





The U.S. Naval Observatory (USNO) data is currently unavailable. The links provided are from other US Government sources. When USNO data is returned to service, the links will be updated.