572
CXUS53 KLOT 011542
CLMORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1042 AM CDT MON JUN 01 2026
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..THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF MAY 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 98 05/31/1934
LOW 27 05/09/1983
05/02/1875
HIGHEST 87 05/17 94 05/15
LOWEST 32 05/02 37 05/09
AVG. MAXIMUM 70.5 70.5 0.0 67.7
AVG. MINIMUM 49.6 50.6 -1.0 48.4
MEAN 60.1 60.6 -0.5 58.0
DAYS MAX >= 90 0 1.0 -1.0 1
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 1 0.2 0.8 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 9.51 2020
MINIMUM 0.30 1992
TOTALS 1.17 4.49 -3.32 1.35
DAILY AVG. 0.04 0.14 -0.10 0.04
DAYS >= .01 8 12.5 -4.5 6
DAYS >= .10 3 8.1 -5.1 4
DAYS >= .50 0 3.0 -3.0 1
DAYS >= 1.00 0 1.1 -1.1 0
GREATEST
24 HR. TOTAL 0.44 05/24 TO 05/24 0.62
SNOWFALL (INCHES)
RECORDS
TOTAL 2.2 1940
TOTALS 0.0 0.0 0.0 T
SINCE 7/1 34.1 38.4 -4.3 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 T
DEGREE DAYS
HEATING TOTAL 203 198 5 235
SINCE 7/1 5558 5943 -385 MM
COOLING TOTAL 59 60 -1 26
SINCE 1/1 78 70 8 MM
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WIND (MPH)
AVERAGE WIND SPEED 9.5
HIGHEST WIND SPEED/DIRECTION 30/240 DATE 05/18
HIGHEST GUST SPEED/DIRECTION 44/190 DATE 05/03
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.59
NUMBER OF DAYS FAIR 5
NUMBER OF DAYS PC 17
NUMBER OF DAYS CLOUDY 9
AVERAGE RH (PERCENT) 57
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 1
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 5 FOG W/VIS <= 1/4 MILE 0
HAZE 3
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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