Climatological Report (Daily)
Issued by NWS Chicago, IL

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273
CDUS43 KLOT 172246
CLIRFD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
444 PM CST SUN DEC 17 2017


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

...THE ROCKFORD IL CLIMATE SUMMARY FOR DECEMBER 17 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

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)
 TODAY
  MAXIMUM         40    341 PM  50    2006  32      8       20
                                      1977
                                      1941
  MINIMUM         27   1214 AM -12    1945  17     10       13
  AVERAGE         34                        25      9       17

PRECIPITATION (IN)
  TODAY            0.00          0.80 1921   0.06  -0.06     0.13
  MONTH TO DATE    0.11                      1.21  -1.10     1.38
  SINCE DEC 1      0.11                      1.21  -1.10     1.38
  SINCE JAN 1     44.29                     35.47   8.82    34.66

SNOWFALL (IN)
  TODAY            0.0           3.8  1951   0.4   -0.4      2.0
  MONTH TO DATE    1.5                       5.9   -4.4     15.0
  SINCE DEC 1      1.5                       5.9   -4.4     15.0
  SINCE JUL 1      1.7                       7.7   -6.0     15.0

DEGREE DAYS
 HEATING
  TODAY           31                        40     -9       48
  MONTH TO DATE  574                       638    -64      727
  SINCE DEC 1    574                       638    -64      727
  SINCE JUL 1   1788                      1973   -185     1596

 COOLING
  TODAY            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    13   HIGHEST WIND DIRECTION    NE (60)
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION     E (80)
  AVERAGE WIND SPEED     6.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96           300 AM
 LOWEST     79           200 PM
 AVERAGE    88

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


THE ROCKFORD IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   32        55      1941
 MINIMUM TEMPERATURE (F)   17       -17      1983


SUNRISE AND SUNSET
DECEMBER 17 2017......SUNRISE   719 AM CST   SUNSET   426 PM CST
DECEMBER 18 2017......SUNRISE   720 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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