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
................................................................

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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