Climatological Report (Annual)
Issued by NWS Chicago, IL

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000
CXUS53 KLOT 011343
CLARFD


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

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

...THE ROCKFORD IL CLIMATE SUMMARY FOR THE YEAR OF 2017...

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

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             112   07/14/1936
 LOW              -27   01/10/1982
HIGHEST            94   06/12        MM      MM       94  07/24
                        06/11                             07/21
LOWEST             -9   12/27        MM      MM      -13  12/19
AVG. MAXIMUM     60.9              59.3     1.6     61.1
AVG. MINIMUM     41.3              39.2     2.1     42.6
MEAN             51.1              49.2     1.9     51.9
DAYS MAX >= 90     16              14.9     1.1       11
DAYS MAX <= 32     33              46.1   -13.1       45
DAYS MIN <= 32    117             133.5   -16.5      115
DAYS MIN <= 0       9              11.6    -2.6       11

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        56.48   1973
 MINIMUM        22.87   1910
TOTALS          44.67             36.24    8.43    35.16
DAILY AVG.       0.12              0.10    0.02     0.10
DAYS >= .01       125             119.2     5.8      123
DAYS >= .10        71              67.3     3.7       67
DAYS >= .50        28              23.0     5.0       22
DAYS >= 1.00       11               8.2     2.8       11
GREATEST
 24 HR. TOTAL    4.11   06/28 TO 06/28              1.64

SNOWFALL (INCHES)
RECORDS
 TOTAL           84.3   2008
 24 HR TOTAL       MM
 SNOW DEPTH        27   01/16/1979
TOTALS           10.9              36.7   -25.8     26.1
SINCE 7/1         4.9              13.1    -8.2     16.1
SNOWDEPTH AVG.      0                MM      MM        1
DAYS >= TRACE      49              28.7    20.3       67
DAYS >= 1.0         4              11.0    -7.0        8
GREATEST
 SNOW DEPTH         4   03/14                          9
 24 HR TOTAL      3.6   03/13 TO 03/13               5.3

DEGREE_DAYS
HEATING TOTAL    5783              6569    -786     5809
 SINCE 7/1         MM              2561      MM       MM
COOLING TOTAL     828               820       8     1103
 SINCE 1/1        828               820       8     1103

FREEZE DATES
RECORD
 EARLIEST     09/13/1975
 LATEST       05/27/1992
EARLIEST                        10/07
LATEST                          05/01
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
HIGHEST WIND SPEED/DIRECTION    69/010    DATE  03/11
HIGHEST GUST SPEED/DIRECTION    69/010    DATE  03/11

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           67
NUMBER OF DAYS PC            153
NUMBER OF DAYS CLOUDY        145

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             59     MIXED PRECIP               0
HEAVY RAIN               23     RAIN                      50
LIGHT RAIN              145     FREEZING RAIN              0
LT FREEZING RAIN          6     HAIL                       4
HEAVY SNOW                0     SNOW                       7
LIGHT SNOW               42     SLEET                      5
FOG                     164     FOG W/VIS <= 1/4 MILE     22
HAZE                     45

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

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