Climatological Report (Monthly)
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
775
CXUS53 KLOT 011449
CLMRFD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
949 AM CDT MON SEP 01 2025
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...THE ROCKFORD IL CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1905 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 08/16/1988
08/05/1918
LOW 35 08/30/1915
HIGHEST 90 08/08 98 08/27
08/09
LOWEST 46 08/26 49 08/21
AVG. MAXIMUM 80.7 82.0 -1.3 82.9
AVG. MINIMUM 60.5 61.8 -1.3 61.2
MEAN 70.6 71.9 -1.3 72.1
DAYS MAX >= 90 2 3.0 -1.0 5
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 13.98 2007
MINIMUM 0.21 1922
TOTALS 3.30 4.19 -0.89 2.22
DAILY AVG. 0.11 0.14 -0.03 0.07
DAYS >= .01 7 9.3 -2.3 7
DAYS >= .10 4 6.2 -2.2 5
DAYS >= .50 3 2.6 0.4 2
DAYS >= 1.00 1 1.3 -0.3 0
GREATEST
24 HR. TOTAL 1.40 08/10 TO 08/10 0.82
DEGREE DAYS
HEATING TOTAL 19 8 11 7
SINCE 7/1 19 6 13 MM
COOLING TOTAL 201 222 -21 235
SINCE 1/1 857 739 118 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.5
HIGHEST WIND SPEED/DIRECTION 35/350 DATE 08/16
HIGHEST GUST SPEED/DIRECTION 46/340 DATE 08/16
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.52
NUMBER OF DAYS FAIR 7
NUMBER OF DAYS PC 18
NUMBER OF DAYS CLOUDY 6
AVERAGE RH (PERCENT) 74
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 6 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 4
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 18 FOG W/VIS <= 1/4 MILE 0
HAZE 5
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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