571
CXUS53 KLOT 011542
CLMDPA

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1042 AM CDT MON JUN 01 2026

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

...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1997 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             96   05/27/2012
 LOW              26   05/09/2020
                       05/21/2002
HIGHEST           86   05/17                          93  05/15
LOWEST            29   05/02                          34  05/09
AVG. MAXIMUM    71.2               70.9     0.3     69.8
AVG. MINIMUM    46.5               48.7    -2.2     46.3
MEAN            58.8               59.8    -1.0     58.1
DAYS MAX >= 90     0                0.7    -0.7        1
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     2                0.9     1.1        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        7.71   2019
 MINIMUM        1.21   2023
TOTALS          1.33               4.34   -3.01     1.59
DAILY AVG.      0.04               0.14   -0.10     0.05
DAYS >= .01        9               13.6    -4.6        8
DAYS >= .10        3                8.6    -5.6        4
DAYS >= .50        1                3.2    -2.2        2
DAYS >= 1.00       0                1.1    -1.1        0
GREATEST
 24 HR. TOTAL   0.50   05/24 TO 05/24               0.61


DEGREE DAYS
HEATING TOTAL    230                211      19      233
 SINCE 7/1      5906               6330    -424       MM
COOLING TOTAL     47                 50      -3       27
 SINCE 1/1        59                 56       3       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.1
HIGHEST WIND SPEED/DIRECTION    28/220    DATE  05/03
                                28/270          05/09
HIGHEST GUST SPEED/DIRECTION    42/210    DATE  05/03

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       3
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

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