Climatological Report (Daily)
Issued by NWS Chicago, IL

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034
CDUS43 KLOT 150633
CLIRFD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1233 AM CST FRI DEC 15 2017


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

...THE ROCKFORD IL CLIMATE SUMMARY FOR DECEMBER 14 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         28    258 PM  61    2015  33     -5       19
  MINIMUM         12    706 AM -11    1989  18     -6       -2
                                      1985
                                      1919
  AVERAGE         20                        26     -6        9

PRECIPITATION (IN)
  YESTERDAY        T             0.76 1975   0.06  -0.06      T
  MONTH TO DATE    0.11                      1.02  -0.91     1.06
  SINCE DEC 1      0.11                      1.02  -0.91     1.06
  SINCE JAN 1     44.29                     35.28   9.01    34.34

SNOWFALL (IN)
  YESTERDAY        T             4.5  1983   0.4   -0.4       T
                                      1951
  MONTH TO DATE    1.5                       4.7   -3.2     11.6
  SINCE DEC 1      1.5                       4.7   -3.2     11.6
  SINCE JUL 1      1.7                       6.5   -4.8     11.6
  SNOW DEPTH       T

DEGREE DAYS
 HEATING
  YESTERDAY       45                        40      5       56
  MONTH TO DATE  481                       518    -37      563
  SINCE DEC 1    481                       518    -37      563
  SINCE JUL 1   1695                      1853   -158     1432

 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     N (350)
  HIGHEST GUST SPEED    27   HIGHEST GUST DIRECTION     N (350)
  AVERAGE WIND SPEED     6.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    80           500 AM
 LOWEST     50           200 PM
 AVERAGE    65

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


THE ROCKFORD IL CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   33        58      1971
 MINIMUM TEMPERATURE (F)   18       -16      1989


SUNRISE AND SUNSET
DECEMBER 15 2017......SUNRISE   718 AM CST   SUNSET   425 PM CST
DECEMBER 16 2017......SUNRISE   719 AM CST   SUNSET   425 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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