Climatological Report (Daily)
Issued by NWS Chicago, IL

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CDUS43 KLOT 161230
CLIRFD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1232 AM CST SAT DEC 16 2017


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

...THE ROCKFORD IL CLIMATE SUMMARY FOR DECEMBER 15 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1905 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         36   1159 PM  58    1971  33      3        8
  MINIMUM         23   1218 AM -16    1989  18      5       -6
  AVERAGE         30                        25      5        1

PRECIPITATION (IN)
  YESTERDAY        T             1.71 1971   0.07  -0.07     0.00
  MONTH TO DATE    0.11                      1.09  -0.98     1.06
  SINCE DEC 1      0.11                      1.09  -0.98     1.06
  SINCE JAN 1     44.29                     35.35   8.94    34.34

SNOWFALL (IN)
  YESTERDAY        T            10.6  1987   0.4   -0.4      0.0
  MONTH TO DATE    1.5                       5.1   -3.6     11.6
  SINCE DEC 1      1.5                       5.1   -3.6     11.6
  SINCE JUL 1      1.7                       6.9   -5.2     11.6
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       35                        40     -5       64
  MONTH TO DATE  516                       558    -42      627
  SINCE DEC 1    516                       558    -42      627
  SINCE JUL 1   1730                      1893   -163     1496

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    828                       820      8     1103
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    27   HIGHEST GUST DIRECTION     W (290)
  AVERAGE WIND SPEED    11.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    74           500 AM
 LOWEST     56          1100 PM
 AVERAGE    65

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


THE ROCKFORD IL CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   33        58      1984
 MINIMUM TEMPERATURE (F)   17       -14      1932


SUNRISE AND SUNSET
DECEMBER 16 2017......SUNRISE   719 AM CST   SUNSET   425 PM CST
DECEMBER 17 2017......SUNRISE   719 AM CST   SUNSET   426 PM CST


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




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