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Climatological Report (Annual)
Issued by NWS Chicago, IL

215
CXUS53 KLOT 021750
CLARFD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1150 AM CST SAT JAN 02 2021

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

...THE ROCKFORD IL CLIMATE SUMMARY FOR THE YEAR OF 2020...

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1905 TO 2021

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             -31   01/31/2019
HIGHEST           95   08/27         MM      MM       97  07/20
                       08/25
                       08/24
                       07/26
LOWEST           -10   02/14         MM      MM      -31  01/31
AVG. MAXIMUM    61.2               59.3     1.9     57.8
AVG. MINIMUM    41.6               39.2     2.4     39.5
MEAN            51.4               49.2     2.2     48.7
DAYS MAX >= 90    23               14.9     8.1       17
DAYS MAX <= 32    23               46.1   -23.1       60
DAYS MIN <= 32   124              133.5    -9.5      145
DAYS MIN <= 0      2               11.6    -9.6       13

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       56.48   1973
 MINIMUM       22.87   1910
TOTALS         34.61              36.24   -1.63    49.42
DAILY AVG.      0.09               0.10   -0.01     0.14
DAYS >= .01      111              119.2    -8.2      149
DAYS >= .10       66               67.3    -1.3       97
DAYS >= .50       24               23.0     1.0       37
DAYS >= 1.00       8                8.2    -0.2       13
GREATEST
 24 HR. TOTAL   2.06   09/08 TO 09/08               2.92

SNOWFALL (INCHES)
RECORDS
 TOTAL          84.3   2008
 24 HR TOTAL      MM
 SNOW DEPTH       27   01/16/1979
TOTALS          32.2               36.7    -4.5     52.4
SINCE 7/1        9.1               13.1    -4.0     11.2
SNOWDEPTH AVG.     0                                   1
DAYS >= TRACE     61                 MM      MM       67
DAYS >= 1.0       11               11.0     0.0       18
GREATEST
 SNOW DEPTH        7   01/25                          17
 24 HR TOTAL     5.7   12/29 TO 12/29                6.3

DEGREE DAYS
HEATING TOTAL   5909               6569    -660     6752
 SINCE 7/1      2189               2561    -372       MM
COOLING TOTAL   1042                820     222      927
 SINCE 1/1      1042                820     222      927

FREEZE DATES
RECORD
 EARLIEST     09/13/1975
 LATEST       05/27/1992
EARLIEST                        10/16
LATEST                          05/09
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.6
HIGHEST WIND SPEED/DIRECTION    38/220    DATE  11/10
                                38/270          08/10
                                38/270          04/20
HIGHEST GUST SPEED/DIRECTION    57/260    DATE  04/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.59
NUMBER OF DAYS FAIR           79
NUMBER OF DAYS PC            145
NUMBER OF DAYS CLOUDY        142

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             42     MIXED PRECIP               0
HEAVY RAIN               15     RAIN                      32
LIGHT RAIN              130     FREEZING RAIN              1
LT FREEZING RAIN         13     HAIL                       2
HEAVY SNOW                0     SNOW                      15
LIGHT SNOW               60     SLEET                      8
FOG                     140     FOG W/VIS <= 1/4 MILE      8
HAZE                     56

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

$$