Climatological Report (Annual)
Issued by NWS Chicago, IL

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000
CXUS53 KLOT 011331
CLARFD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
727 AM CST SUN JAN 1 2012

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

...THE ROCKFORD IL CLIMATE SUMMARY FOR THE YEAR OF 2011...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1893 TO 2011

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             112   07/14/1936
 LOW              -27   01/10/1982
HIGHEST           100   07/20        58      42
                        07/19
LOWEST            -20   02/10        38     -58
AVG. MAXIMUM     59.4              59.3     0.1
AVG. MINIMUM     40.9              39.2     1.7
MEAN             50.2              49.2     1.0
DAYS MAX >= 90     27              14.9    12.1
DAYS MAX <= 32     44              46.1    -2.1
DAYS MIN <= 32    127             133.5    -6.5
DAYS MIN <= 0       7              11.6    -4.6

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        56.48   1973
 MINIMUM        22.87   1910
TOTALS          39.04             36.24    2.80
DAILY AVG.       0.11              0.10    0.01
DAYS >= .01       128             119.2     8.8
DAYS >= .10        66              67.3    -1.3
DAYS >= .50        28              23.0     5.0
DAYS >= 1.00        7               8.2    -1.2
GREATEST
 24 HR. TOTAL    3.95   09/26 TO 09/27
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           84.3   2008
 24 HR TOTAL       MM
 SNOW DEPTH        27   01/16/1979
TOTALS           33.8              36.7    -2.9
 LIQUID EQUIV    3.38              3.90   -0.52
SINCE 7/1         1.7              13.1   -11.4
 LIQUID 7/1      0.17              1.30   -1.13
SNOWDEPTH AVG.      1                MM      MM
DAYS >= TRACE      63              28.8    34.2
DAYS >= 1.0         8              11.1    -3.1
GREATEST
 SNOW DEPTH        19   02/03
                        02/02
 24 HR TOTAL     10.9   02/20 TO 02/20
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    6309              6569    -260
 SINCE 7/1         MM              2561      MM
COOLING TOTAL    1019               820     199
 SINCE 1/1       1019               820     199

FREEZE DATES
EARLIEST                        10/07
LATEST                          05/01
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.5
HIGHEST WIND SPEED/DIRECTION    55/310    DATE  06/08
HIGHEST GUST SPEED/DIRECTION    69/310    DATE  06/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR           66
NUMBER OF DAYS PC            142
NUMBER OF DAYS CLOUDY        157


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             40     MIXED PRECIP               1
HEAVY RAIN               28     RAIN                      45
LIGHT RAIN              132     FREEZING RAIN              1
LT FREEZING RAIN         10     HAIL                       2
HEAVY SNOW                3     SNOW                      16
LIGHT SNOW               59     SLEET                      8
FOG                     166     FOG W/VIS <= 1/4 MILE     12
HAZE                     98

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

$$
ACS



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