Climatological Report (Monthly)
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CXUS53 KLOT 011741
CLMORD

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

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF APRIL 2021...

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1871 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             91   04/22/1980
                       04/30/1942
 LOW               7   04/07/1982
HIGHEST           87   04/27         MM      MM       80  04/07
LOWEST            24   04/01         MM      MM       27  04/15
AVG. MAXIMUM    61.3               59.0     2.3     58.0
AVG. MINIMUM    42.5               38.8     3.7     38.7
MEAN            51.9               48.9     3.0     48.4
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     3                6.3    -3.3        3
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.68   2013
 MINIMUM        0.14   1899
TOTALS          0.71               3.38   -2.67     3.81
DAILY AVG.      0.02               0.11   -0.09     0.13
DAYS >= .01        5               12.0    -7.0       16
DAYS >= .10        2                6.4    -4.4       10
DAYS >= .50        0                2.4    -2.4        1
DAYS >= 1.00       0                0.8    -0.8        1
GREATEST
 24 HR. TOTAL   0.36   04/08 TO 04/08               1.89  04/29 TO 04/29

SNOWFALL (INCHES)
RECORDS
 TOTAL          13.6   1938
TOTALS             T                1.2    -1.2      4.7
SINCE 7/1       48.8               36.3    12.5       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.3    -0.3        2
GREATEST
 SNOW DEPTH        0                                   2  04/17
 24 HR TOTAL       T   04/20 TO 04/20

DEGREE DAYS
HEATING TOTAL    402                492     -90      492
 SINCE 7/1      5380               6068    -688     5558
COOLING TOTAL     18                  9       9        1
 SINCE 1/1        18                 10       8        1
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.6
HIGHEST WIND SPEED/DIRECTION    36/300    DATE  04/29
HIGHEST GUST SPEED/DIRECTION    57/310    DATE  04/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.61
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         11


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      6

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

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