978
CXUS53 KLOT 011008
CLMRFD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
508 AM CDT THU OCT 01 2026

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

...THE ROCKFORD IL CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1905 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            103   09/07/1939
 LOW              24   09/28/1942
HIGHEST           96   09/02                          89  09/29
LOWEST            44   09/14                          39  09/07
AVG. MAXIMUM    77.6               75.3     2.3     79.6
AVG. MINIMUM    58.4               53.5     4.9     53.4
MEAN            68.0               64.4     3.6     66.5
DAYS MAX >= 90     4                2.0     2.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.3    -0.3        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       10.68   1961
 MINIMUM        0.05   1979
TOTALS          7.40               3.62    3.78     1.05
DAILY AVG.      0.25               0.12    0.13     0.04
DAYS >= .01       13                8.4     4.6        4
DAYS >= .10        7                5.4     1.6        2
DAYS >= .50        5                2.3     2.7        1
DAYS >= 1.00       2                1.0     1.0        0
GREATEST
 24 HR. TOTAL   3.04   09/19 TO 09/20               0.74

DEGREE DAYS
HEATING TOTAL     49                107     -58       59
 SINCE 7/1        49                116     -67       MM
COOLING TOTAL    146                 89      57      111
 SINCE 1/1       893                828      65       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.3
HIGHEST WIND SPEED/DIRECTION    25/290    DATE  09/15
                                25/320          09/19
HIGHEST GUST SPEED/DIRECTION    32/170    DATE  09/14
                                32/360          09/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     76

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              9     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       8
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      23     FOG W/VIS <= 1/4 MILE      0
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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