Climatological Report (Daily)
Issued by NWS Chicago, IL

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CDUS43 KLOT 010636
CLIRFD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1236 AM CST MON JAN 1 2018


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

...THE ROCKFORD IL CLIMATE SUMMARY FOR DECEMBER 31 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          9    302 PM  56    1965  30    -21       40
  MINIMUM         -8   1159 PM -17    1963  14    -22       22
  AVERAGE          1                        22    -21       31

PRECIPITATION (IN)
  YESTERDAY        T             0.72 1923   0.05  -0.05     0.00
  MONTH TO DATE    0.49                      1.98  -1.49     1.88
  SINCE DEC 1      0.49                      1.98  -1.49     1.88
  SINCE JAN 1     44.67                     36.24   8.43    35.16

SNOWFALL (IN)
  YESTERDAY        T             8.5  1978   0.4   -0.4      0.0
  MONTH TO DATE    4.7                      11.3   -6.6     16.1
  SINCE DEC 1      4.7                      11.3   -6.6     16.1
  SINCE JUL 1      4.9                      13.1   -8.2     16.1
  SNOW DEPTH       2

DEGREE DAYS
 HEATING
  YESTERDAY       64                        43     21       34
  MONTH TO DATE 1245                      1226     19     1270
  SINCE DEC 1   1245                      1226     19     1270
  SINCE JUL 1   2459                      2561   -102     2139

 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    17   HIGHEST WIND DIRECTION     N (350)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED    10.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.3


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    72           700 AM
 LOWEST     55           300 PM
 AVERAGE    64

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


THE ROCKFORD IL CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   30        57      1897
 MINIMUM TEMPERATURE (F)   14       -13      1968
                                             1924


SUNRISE AND SUNSET
JANUARY  1 2018.......SUNRISE   725 AM CST   SUNSET   435 PM CST
JANUARY  2 2018.......SUNRISE   725 AM CST   SUNSET   436 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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