Climatological Report (Monthly)
Issued by NWS Chicago, IL

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CXUS53 KLOT 011741
CLMRFD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1241 PM CDT SAT MAY 01 2021

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

...THE ROCKFORD IL CLIMATE SUMMARY FOR THE MONTH OF APRIL 2021...

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             93   04/10/1930
 LOW               5   04/07/1982
HIGHEST           86   04/27         MM      MM       78  04/07
LOWEST            21   04/02         MM      MM       23  04/16
AVG. MAXIMUM    63.3               60.7     2.6     58.0
AVG. MINIMUM    41.6               38.1     3.5     37.2
MEAN            52.5               49.4     3.1     47.6
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.1    -0.1        0
DAYS MIN <= 32     4                7.5    -3.5        6
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        9.92   1973
 MINIMUM        0.28   1915
TOTALS          1.66               3.35   -1.69     2.79
DAILY AVG.      0.06               0.11   -0.05     0.09
DAYS >= .01        6               11.3    -5.3       17
DAYS >= .10        5                6.4    -1.4        9
DAYS >= .50        2                2.4    -0.4        1
DAYS >= 1.00       0                0.8    -0.8        0
GREATEST
 24 HR. TOTAL   0.77   04/10 TO 04/10               0.50  04/29 TO 04/29

SNOWFALL (INCHES)
RECORDS
 TOTAL           9.0   1936
TOTALS             T                0.9    -0.9      3.3
SINCE 7/1       36.5               36.7    -0.2       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.3    -0.3        1
GREATEST
 SNOW DEPTH        0                                   3  04/17
 24 HR TOTAL       T   04/20 TO 04/20

DEGREE DAYS
HEATING TOTAL    384                476     -92      516
 SINCE 7/1      5810               6340    -530     5923
COOLING TOTAL     14                  8       6        0
 SINCE 1/1        14                  8       6        0
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.4
HIGHEST WIND SPEED/DIRECTION    37/160    DATE  04/26
HIGHEST GUST SPEED/DIRECTION    52/150    DATE  04/26

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.64
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY         10


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       2
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      0
HAZE                      5

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

$$



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