Climatological Report (Monthly)
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CXUS53 KGRR 011650
CLMMKG


CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
1143 AM EST MON JAN 1 2018

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

...THE MUSKEGON MI CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1896 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              66   12/03/2012
 LOW              -15   12/31/1976
HIGHEST            61   12/04        51      10       52  12/26
LOWEST             -6   12/31         5     -11       10  12/15
AVG. MAXIMUM     32.0              35.1    -3.1     34.9
AVG. MINIMUM     20.4              25.3    -4.9     26.2
MEAN             26.2              30.2    -4.0     30.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     18              10.9     7.1        9
DAYS MIN <= 32     29              23.8     5.2       23
DAYS MIN <= 0       2               0.2     1.8        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.99   2008
 MINIMUM         0.47   1930
TOTALS           2.77              2.55    0.22     2.22
DAILY AVG.       0.09              0.08    0.01     0.07
DAYS >= .01        20              15.7     4.3       16
DAYS >= .10        11               7.1     3.9        6
DAYS >= .50         0               1.0    -1.0        1
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.42   12/29 TO 12/29

SNOWFALL (INCHES)
RECORDS
 TOTAL           82.6   1963
 24 HR TOTAL     14.8   12/17/1963 TO 12/17/1963
 SNOW DEPTH        34   12/20/1963
TOTALS           51.7              28.9    22.8     20.4
SINCE 7/1        51.7              35.1    16.6     21.4
SNOWDEPTH AVG.      6                 4       2        4
DAYS >= TRACE      22              12.9     9.1       20
DAYS >= 1.0        14               8.6     5.4        7
GREATEST
 SNOW DEPTH        18   12/30                         10  12/17
 24 HR TOTAL     14.7   12/29 TO 12/29

DEGREE_DAYS
HEATING TOTAL    1194              1079     115     1060
 SINCE 7/1       2353              2446     -93     1965
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        615               566      49      774

FREEZE DATES
RECORD
 EARLIEST     09/22/1976
 LATEST       06/22/1992
EARLIEST                        10/14
LATEST                          05/04
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.5
RESULTANT WIND SPEED/DIRECTION   3/269
HIGHEST WIND SPEED/DIRECTION    37/230    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    49/250    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY         24

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                8     SNOW                      13
LIGHT SNOW               22     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      6
HAZE                     17

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

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