Climatological Report (Monthly)
Issued by NWS
Issued by NWS
776
CXUS53 KLOT 011449
CLMMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
949 AM CDT MON SEP 01 2025
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...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1928 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 104 08/09/1934
LOW 43 08/29/1965
HIGHEST 96 08/16 99 08/27
LOWEST 55 08/26 56 08/22
AVG. MAXIMUM 82.9 82.7 0.2 84.2
AVG. MINIMUM 67.3 66.4 0.9 66.9
MEAN 75.1 74.5 0.6 75.5
DAYS MAX >= 90 6 4.0 2.0 7
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 9.95 1987
MINIMUM 0.71 2008
TOTALS 3.22 3.99 -0.77 3.74
DAILY AVG. 0.10 0.13 -0.03 0.12
DAYS >= .01 7 9.9 -2.9 9
DAYS >= .10 6 6.4 -0.4 6
DAYS >= .50 1 2.7 -1.7 3
DAYS >= 1.00 1 1.0 0.0 1
GREATEST
24 HR. TOTAL 1.58 08/17 TO 08/17 1.27
DEGREE DAYS
HEATING TOTAL 2 3 -1 0
SINCE 7/1 2 1 1 MM
COOLING TOTAL 322 299 23 336
SINCE 1/1 1141 956 185 MM
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WIND (MPH)
AVERAGE WIND SPEED 8.3
HIGHEST WIND SPEED/DIRECTION 25/360 DATE 08/16
HIGHEST GUST SPEED/DIRECTION 53/300 DATE 08/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.51
NUMBER OF DAYS FAIR 8
NUMBER OF DAYS PC 20
NUMBER OF DAYS CLOUDY 3
AVERAGE RH (PERCENT) 63
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 7 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 4
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 8 FOG W/VIS <= 1/4 MILE 1
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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