Climatological Report (Monthly)
Issued by NWS

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CXUS53 KABR 011513
CLMATY


CLIMATE REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
900 AM CST MON JAN 1 2018

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

...THE WATERTOWN SD CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1898 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/06/1939
 LOW              -37   12/18/2016
HIGHEST            50   12/02        MM      MM       39  12/05
LOWEST            -27   12/31        MM      MM      -37  12/18
AVG. MAXIMUM     26.6              24.8     1.8     22.2
AVG. MINIMUM      9.1               7.2     1.9      4.4
MEAN             17.9              16.0     1.9     13.3
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     18              21.0    -3.0       23
DAYS MIN <= 32     31              30.9     0.1       31
DAYS MIN <= 0       8               9.7    -1.7       12

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.36   1955
 MINIMUM            T   1986
TOTALS           0.25              0.53   -0.28     1.25
DAYS >= .01         8               6.1     1.9        9
DAYS >= .10         1               1.7    -0.7        4
DAYS >= .50         0               0.2    -0.2        1
DAYS >= 1.00        0               0.0     0.0        0

SNOWFALL (INCHES)
RECORDS
 TOTAL           29.0   2010
 SNOW DEPTH        20   12/31/2010
TOTALS            4.5               7.1    -2.6     13.6
SINCE 7/1         6.4              13.7    -7.3     17.7
SNOWDEPTH AVG.      0                MM      MM        5
DAYS >= TRACE      13               6.2     6.8       14
DAYS >= 1.0         2               2.8    -0.8        3
GREATEST
 SNOW DEPTH         3   12/31                         13  12/18
                        12/30                             12/17

DEGREE_DAYS
HEATING TOTAL    1453              1519     -66     1595
 SINCE 7/1       3218              3459    -241     2966
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        440               515     -75      721

FREEZE DATES
RECORD
 EARLIEST     MM
 LATEST       MM
EARLIEST                        MM
LATEST                          MM
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.6
RESULTANT WIND SPEED/DIRECTION   6/297
HIGHEST WIND SPEED/DIRECTION    41/320    DATE  12/04
HIGHEST GUST SPEED/DIRECTION    52/330    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     78

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               14     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      1
HAZE                      5

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

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