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 270636
CLIORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1236 AM CST WED JAN 27 2021

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 26 2021...

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)
 YESTERDAY
  MAXIMUM         32   3:13 PM  62    1944  31      1       33
  MINIMUM         25  11:59 PM -16    1897  16      9       27
  AVERAGE         29                        24      5       30

PRECIPITATION (IN)
  YESTERDAY        0.48          1.66 1967   0.05   0.43      T
  MONTH TO DATE    1.30                      1.48  -0.18     2.72
  SINCE DEC 1      3.85                      3.73   0.12     4.27
  SINCE JAN 1      1.30                      1.48  -0.18     2.72

SNOWFALL (IN)
  YESTERDAY        5.3          16.4  1967   0.4    4.9       T
  MONTH TO DATE   11.1                       9.0    2.1      7.2
  SINCE DEC 1     13.9                      17.2   -3.3      9.2
  SINCE JUL 1     14.6                      18.6   -4.0     17.5
  SNOW DEPTH       3

DEGREE DAYS
 HEATING
  YESTERDAY       36                        41     -5       35
  MONTH TO DATE  904                      1074   -170      915
  SINCE DEC 1   1894                      2229   -335     1870
  SINCE JUL 1   2893                      3485   -592     3223

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    25   HIGHEST WIND DIRECTION     N (350)
  HIGHEST GUST SPEED    34   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED    17.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  SNOW
  LIGHT SNOW
  FOG
  BLOWING SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    89          12:00 AM
 LOWEST     71          10:00 PM
 AVERAGE    80

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   31        62      1916
 MINIMUM TEMPERATURE (F)   16       -10      1955


SUNRISE AND SUNSET
JANUARY 27 2021.......SUNRISE   7:09 AM CST   SUNSET   5:01 PM CST
JANUARY 28 2021.......SUNRISE   7:08 AM CST   SUNSET   5:02 PM CST


-  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.