Climatological Report (Daily)
Issued by NWS Chicago, IL

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CDUS43 KLOT 130633
CLIRFD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1232 AM CST WED DEC 13 2017


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

...THE ROCKFORD IL CLIMATE SUMMARY FOR DECEMBER 12 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   1203 AM  60    1991  34     -6       29
  MINIMUM         13    751 AM  -9    2000  19     -6        7
  AVERAGE         21                        26     -5       18

PRECIPITATION (IN)
  YESTERDAY        T             0.79 1909   0.06  -0.06     0.00
  MONTH TO DATE    0.11                      0.89  -0.78     1.06
  SINCE DEC 1      0.11                      0.89  -0.78     1.06
  SINCE JAN 1     44.29                     35.15   9.14    34.34

SNOWFALL (IN)
  YESTERDAY        T             8.0  1909   0.4   -0.4      0.0
  MONTH TO DATE    1.5                       3.9   -2.4     11.6
  SINCE DEC 1      1.5                       3.9   -2.4     11.6
  SINCE JUL 1      1.7                       5.7   -4.0     11.6
  SNOW DEPTH       1

DEGREE DAYS
 HEATING
  YESTERDAY       44                        39      5       47
  MONTH TO DATE  401                       439    -38      449
  SINCE DEC 1    401                       439    -38      449
  SINCE JUL 1   1615                      1774   -159     1318

 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    24   HIGHEST WIND DIRECTION     N (350)
  HIGHEST GUST SPEED    31   HIGHEST GUST DIRECTION     N (350)
  AVERAGE WIND SPEED    10.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    73           800 AM
 LOWEST     52           200 PM
 AVERAGE    63

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


THE ROCKFORD IL CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   34        62      2015
 MINIMUM TEMPERATURE (F)   18       -14      1958


SUNRISE AND SUNSET
DECEMBER 13 2017......SUNRISE   717 AM CST   SUNSET   425 PM CST
DECEMBER 14 2017......SUNRISE   717 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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