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CXUS53 KLOT 011527
CLMORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1027 AM CDT SUN JUN 01 2025

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF MAY 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             98   05/31/1934
 LOW              27   05/09/1983
                       05/02/1875
HIGHEST           94   05/15                          89  05/21
LOWEST            37   05/09                          45  05/30
AVG. MAXIMUM    67.7               70.5    -2.8     75.2
AVG. MINIMUM    48.4               50.6    -2.2     54.5
MEAN            58.0               60.6    -2.6     64.8
DAYS MAX >= 90     1                1.0     0.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.2    -0.2        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        9.51   2020
 MINIMUM        0.30   1992
TOTALS          1.35               4.49   -3.14     4.06
DAILY AVG.      0.04               0.14   -0.10     0.13
DAYS >= .01        6               12.5    -6.5       13
DAYS >= .10        4                8.1    -4.1       10
DAYS >= .50        1                3.0    -2.0        4
DAYS >= 1.00       0                1.1    -1.1        0
GREATEST
 24 HR. TOTAL   0.62   05/20 TO 05/20               0.79

SNOWFALL (INCHES)
RECORDS
 TOTAL           2.2   1940
TOTALS             T                0.0     0.0      0.0
SINCE 7/1       17.6               38.4   -20.8       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0  MM
 24 HR TOTAL       T   05/15 TO 05/15                0.0

DEGREE DAYS
HEATING TOTAL    235                198      37       68
 SINCE 7/1      5428               5943    -515       MM
COOLING TOTAL     26                 60     -34       71
 SINCE 1/1        34                 70     -36       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.0
HIGHEST WIND SPEED/DIRECTION    31/190    DATE  05/15
HIGHEST GUST SPEED/DIRECTION    50/200    DATE  05/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.64
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       4
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      0
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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