578
CXUS53 KLOT 011154
CLMRFD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
554 AM CST THU JAN 01 2026
...............................
..THE ROCKFORD IL CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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
............................................................
TEMPERATURE (F)
RECORD
HIGH 69 12/15/2021
12/03/2012
LOW -24 12/24/1983
HIGHEST 50 12/28 55 12/08
LOWEST -6 12/14 2 12/12
AVG. MAXIMUM 32.0 34.3 -2.3 37.0
AVG. MINIMUM 15.2 20.2 -5.0 22.2
MEAN 23.6 27.3 -3.7 29.6
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 17 12.0 5.0 8
DAYS MIN <= 32 28 27.3 0.7 24
DAYS MIN <= 0 3 2.4 0.6 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.04 1971
MINIMUM 0.17 1907
TOTALS 1.78 1.93 -0.15 1.13
DAILY AVG. 0.06 0.06 -0.00 0.04
DAYS >= .01 12 9.8 2.2 9
DAYS >= .10 4 4.6 -0.6 3
DAYS >= .50 1 1.2 -0.2 0
DAYS >= 1.00 0 0.3 -0.3 0
GREATEST
24 HR. TOTAL 0.90 12/27 TO 12/28 0.45
12/28 TO 12/29
SNOWFALL (INCHES)
RECORDS
TOTAL 30.1 2000
TOTALS 9.2 9.4 -0.2 4.6
SINCE 7/1 19.2 11.9 7.3 MM
SNOWDEPTH AVG. 2 0
DAYS >= 1.0 2 3.0 -1.0 3
GREATEST
SNOW DEPTH 9 12/07 2 12/18
12/20
12/21
24 HR TOTAL 5.8 12/06 TO 12/07 2.4
DEGREE DAYS
HEATING TOTAL 1276 1170 106 1091
SINCE 7/1 2439 2486 -47 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 1015 839 176 MM
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WIND (MPH)
AVERAGE WIND SPEED 9.0
HIGHEST WIND SPEED/DIRECTION 33/280 DATE 12/28
HIGHEST GUST SPEED/DIRECTION 44/250 DATE 12/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.79
NUMBER OF DAYS FAIR 3
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 20
AVERAGE RH (PERCENT) 77
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 3 HAIL 0
HEAVY SNOW 1 SNOW 3
LIGHT SNOW 15 SLEET 0
FOG 20 FOG W/VIS <= 1/4 MILE 5
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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