Climatological Report (Monthly)
Issued by NWS

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438
CXUS53 KLOT 011646
CLMMDW

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

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

...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR THE MONTH OF MAY 2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1928 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            102   05/31/1934
 LOW              28   05/12/1981
HIGHEST           90   05/24         MM      MM       89  05/24
                                                          05/26
LOWEST            37   05/08         MM      MM       31  05/09
                       05/11
AVG. MAXIMUM    69.4               71.1    -1.7     68.7
AVG. MINIMUM    51.3               52.0    -0.7     51.2
MEAN            60.3               61.5    -1.2     59.9
DAYS MAX >= 90     1                1.1    -0.1        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        1
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        7.67   2019
 MINIMUM        0.25   1992
TOTALS          2.84               4.09   -1.25     7.65
DAILY AVG.      0.09               0.13   -0.04     0.25
DAYS >= .01       13               13.0     0.0       12
DAYS >= .10        6                8.2    -2.2        9
DAYS >= .50        2                2.8    -0.8        3
DAYS >= 1.00       0                1.0    -1.0        2
GREATEST
 24 HR. TOTAL   0.87   05/28 TO 05/28               3.67  05/17 TO 05/17


DEGREE DAYS
HEATING TOTAL    224                178      46      227
 SINCE 7/1      5502               5729    -227     5609
COOLING TOTAL     85                 71      14       76
 SINCE 1/1       109                 82      27       79
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.6
HIGHEST WIND SPEED/DIRECTION    32/230    DATE  05/01
HIGHEST GUST SPEED/DIRECTION    47/240    DATE  05/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.68
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         15


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

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

$$



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