Climatological Report (Monthly)
Issued by NWS Chicago, IL

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CXUS53 KLOT 011646
CLMRFD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1146 AM CDT TUE JUN 01 2021

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

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

CLIMATE NORMAL PERIOD: 1991 TO 2020
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            106   05/31/1934
 LOW              24   05/10/1966
HIGHEST           88   05/01         MM      MM       87  05/26
                       05/24
LOWEST            34   05/08         MM      MM       29  05/09
AVG. MAXIMUM    71.3               71.2     0.1     69.5
AVG. MINIMUM    50.2               49.5     0.7     49.3
MEAN            60.8               60.4     0.4     59.4
DAYS MAX >= 90     0                0.7    -0.7        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.6    -0.6        1
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       11.75   1996
 MINIMUM        0.48   1992
TOTALS          2.36               4.18   -1.82     4.03
DAILY AVG.      0.08               0.13   -0.05     0.13
DAYS >= .01       13               12.9     0.1       11
DAYS >= .10        7                7.6    -0.6        7
DAYS >= .50        1                2.8    -1.8        2
DAYS >= 1.00       0                1.1    -1.1        2
GREATEST
 24 HR. TOTAL   0.65   05/03 TO 05/03               1.53  05/14 TO 05/14

SNOWFALL (INCHES)
RECORDS
 TOTAL             T   2019
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1       36.5               37.1    -0.6       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0  MM
 24 HR TOTAL     0.0

DEGREE DAYS
HEATING TOTAL    210                199      11      224
 SINCE 7/1      6020               6468    -448     6147
COOLING TOTAL     86                 54      32       56
 SINCE 1/1       100                 61      39       56
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.5
HIGHEST WIND SPEED/DIRECTION    37/240    DATE  05/01
HIGHEST GUST SPEED/DIRECTION    57/230    DATE  05/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.68
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         17


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       5
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      1
HAZE                      4

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

$$



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