Climatological Report (Daily)
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
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905
CDUS43 KLOT 180640
CLIRFD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT TUE AUG 18 2026
...................................
...THE ROCKFORD IL CLIMATE SUMMARY FOR AUGUST 17 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1905 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 81 4:17 PM 102 1988 82 -1 85
MINIMUM 62 5:24 AM 46 1924 62 0 69
AVERAGE 72 72 0 77
PRECIPITATION (IN)
YESTERDAY 0.00 2.03 1979 0.14 -0.14 0.02
MONTH TO DATE 1.95 2.27 -0.32 2.31
SINCE JUN 1 10.84 11.31 -0.47 12.18
SINCE JAN 1 21.82 24.87 -3.05 20.58
SNOWFALL (IN)
YESTERDAY 0.0 0.0 MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 12 30 -18 9
SINCE JUL 1 0 3 -3 0
COOLING
YESTERDAY 7 7 0 12
MONTH TO DATE 137 133 4 158
SINCE JUN 1 600 589 11 776
SINCE JAN 1 668 650 18 814
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 6.3
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 10:00 PM
LOWEST 45 2:00 PM
AVERAGE 69
..........................................................
THE ROCKFORD IL CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 101 1936
MINIMUM TEMPERATURE (F) 62 45 1963
SUNRISE AND SUNSET
AUGUST 18 2026........SUNRISE 6:07 AM CDT SUNSET 7:53 PM CDT
AUGUST 19 2026........SUNRISE 6:08 AM CDT SUNSET 7:51 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$