Climatological Report (Monthly)
Issued by NWS Sioux Falls, SD

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387
CXUS53 KFSD 011920
CLMSUX

CLIMATE REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
115 PM CST MON JAN 1 2018

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

...THE SIOUX CITY IA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1889 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              71   12/06/1939
 LOW              -28   12/29/1917
HIGHEST            58   12/03        MM      MM       51  12/04
LOWEST            -24   12/31        MM      MM      -20  12/18
AVG. MAXIMUM     34.3              32.1     2.2     34.2
AVG. MINIMUM     12.7              13.0    -0.3     15.2
MEAN             23.5              22.6     0.9     24.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     11              14.3    -3.3       13
DAYS MIN <= 32     31              30.0     1.0       29
DAYS MIN <= 0       5               4.7     0.3        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.87   1911
 MINIMUM         0.01   1943
TOTALS           0.39              0.80   -0.41     1.48
DAILY AVG.       0.01              0.03   -0.02     0.05
DAYS >= .01         9               6.9     2.1        6
DAYS >= .10         1               2.4    -1.4        2
DAYS >= .50         0               0.3    -0.3        1
DAYS >= 1.00        0               0.0     0.0        1
GREATEST
 24 HR. TOTAL    0.14   12/30 TO 12/30

SNOWFALL (INCHES)
RECORDS
 TOTAL           34.0   2009
TOTALS            7.3               7.8    -0.5      4.5
SINCE 7/1         7.3              13.2    -5.9      5.5
SNOWDEPTH AVG.      1                 3      -2        0
DAYS >= 1.0         3               2.5     0.5        3
GREATEST
 SNOW DEPTH         6   12/31                          2  12/20
                                                          12/19
                                                          12/18
 24 HR TOTAL      3.3   12/30 TO 12/30

DEGREE_DAYS
HEATING TOTAL    1278              1316     -38     1240
 SINCE 7/1       2597              2792    -195     2184
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        951               869      82     1165
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.1
HIGHEST WIND SPEED/DIRECTION    46/320    DATE  12/13
HIGHEST GUST SPEED/DIRECTION    57/320    DATE  12/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               11     SLEET                      0
FOG                      11     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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