Climatological Report (Monthly)
Issued by NWS Grand Rapids, MI

000
CXUS53 KGRR 011325
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MICHIGAN
925 AM EDT SUN OCT 01 2023

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

...THE GRAND RAPIDS CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1892 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             98   09/02/1913
                       09/16/1899
 LOW              27   09/28/1991
HIGHEST           91   09/05         87       4       85  09/03
LOWEST            44   09/19         35       9       38  09/23
AVG. MAXIMUM    74.2               73.9     0.3     72.8
AVG. MINIMUM    54.9               53.1     1.8     54.6
MEAN            64.6               63.5     1.1     63.7
DAYS MAX >= 90     3                0.7     2.3        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.2    -0.2        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       11.85   1986
 MINIMUM        0.00   1979
TOTALS          1.25               3.43   -2.18     1.30
DAILY AVG.      0.04               0.11   -0.07     0.04
DAYS >= .01        5               10.2    -5.2        8
DAYS >= .10        2                6.4    -4.4        4
DAYS >= .50        1                2.2    -1.2        0
DAYS >= 1.00       1                0.8     0.2        0
GREATEST
 24 HR. TOTAL   1.04   09/11 TO 09/11

SNOWFALL (INCHES)
RECORDS
 TOTAL             T   2003
 SNOW DEPTH        T   MM
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        0.0                0.0     0.0       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= TRACE      0                0.0     0.0        0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0  MM

DEGREE DAYS
HEATING TOTAL     77                118     -41      114
 SINCE 7/1        91                135     -44       MM
COOLING TOTAL     73                 73       0       84
 SINCE 1/1       641                725     -84       MM

FREEZE DATES
RECORD
 EARLIEST     09/03/1946
 LATEST       06/04/1945
EARLIEST                        MM
LATEST                          04/27
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.4
RESULTANT WIND SPEED/DIRECTION   1/140
HIGHEST WIND SPEED/DIRECTION    24/230    DATE  09/06
HIGHEST GUST SPEED/DIRECTION    35/220    DATE  09/06

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   47
AVERAGE SKY COVER           0.57
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      2
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

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