Climatological Report (Monthly)
Issued by NWS
Issued by NWS
219
CXUS53 KLOT 011517
CLMORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1017 AM CDT FRI AUG 01 2025
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...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF JULY 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
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TEMPERATURE (F)
RECORD
HIGH 105 07/24/1934
LOW 45 07/07/1983
HIGHEST 95 07/03 92 07/31
LOWEST 58 07/17 54 07/01
07/18
AVG. MAXIMUM 85.9 84.5 1.4 83.8
AVG. MINIMUM 69.0 66.4 2.6 66.2
MEAN 77.5 75.4 2.1 75.0
DAYS MAX >= 90 11 7.0 4.0 4
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 11.15 2011
MINIMUM 0.22 1936
TOTALS 4.29 3.71 0.58 5.89
DAILY AVG. 0.14 0.12 0.02 0.19
DAYS >= .01 15 9.7 5.3 11
DAYS >= .10 6 5.8 0.2 8
DAYS >= .50 4 2.4 1.6 4
DAYS >= 1.00 1 0.9 0.1 3
GREATEST
24 HR. TOTAL 2.07 07/10 TO 07/11 3.14
DEGREE DAYS
HEATING TOTAL 0 2 -2 0
SINCE 7/1 0 0 0 MM
COOLING TOTAL 393 326 67 316
SINCE 1/1 723 595 128 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.8
HIGHEST WIND SPEED/DIRECTION 41/230 DATE 07/16
HIGHEST GUST SPEED/DIRECTION 67/230 DATE 07/16
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.59
NUMBER OF DAYS FAIR 4
NUMBER OF DAYS PC 18
NUMBER OF DAYS CLOUDY 9
AVERAGE RH (PERCENT) 70
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 10 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 6
LIGHT RAIN 16 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 10 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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