Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012125
CLMLND

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
226 PM MST SUN JAN 1 2017

..PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE HUNT FIELD IN LANDER
FOR THE MONTH OF DECEMBER 2016...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2016 WILL BE
AVAILABLE APPROXIMATELY IN FEBRUARY 2017 FROM THE NATIONAL CENTER FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCEI.NOAA.GOV/OL/
CLIMATEDATA.HTML). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON
THE INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...LANDER WAS SLIGHTLY COLDER AND SLIGHTLY WETTER THAN NORMAL IN
DECEMBER...

THE AVERAGE TEMPERATURE FOR LANDER IN DECEMBER WAS 16.7 DEGREES...
WHICH WAS 4.0 DEGREES BELOW NORMAL. THE WARMEST READING OF THE MONTH
WAS 50 DEGREES ON THE 20TH...AND THE COLDEST WAS 21 DEGREES BELOW
ZERO ON THE 17TH.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.90 INCHES...WHICH WAS 0.32
INCHES ABOVE NORMAL FOR THE MONTH...OR 155 PERCENT OF NORMAL.
THE WETTEST 24 HOUR PERIOD DURING THE MONTH WAS ON THE 16TH...WHEN
0.51 INCHES FELL. TOTAL SNOWFALL FOR THE MONTH WAS 9.1 INCHES...WHICH
WAS 90 PERCENT OF NORMAL. MOST OF THIS SNOW FELL ON THE 16TH...WHEN
4.9 INCHES FELL.

THE HIGHEST WIND GUST WAS 29 MPH ON THE 16TH.

...THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1891 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              65   12/11/1937
                        12/10/1933
 LOW              -40   12/19/1924
HIGHEST            50   12/20
LOWEST            -21   12/17
AVG. MAXIMUM     28.6              31.8    -3.2
AVG. MINIMUM      4.8               9.6    -4.8
MEAN             16.7              20.7    -4.0
DAYS MAX >= 90      0
DAYS MAX <= 32     20
DAYS MIN <= 32     31
DAYS MIN <= 0       7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.06   1909
 MINIMUM            T   1933
                        1931
                        1910
TOTALS           0.90              0.58    0.32
DAILY AVG.       0.03              0.02    0.01
DAYS >= .01         5
DAYS >= .10         2
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.52   12/16 TO 12/17

SNOWFALL (INCHES)
TOTALS            9.1              10.1    -1.0
SINCE 7/1        23.1              35.7   -12.6
SNOW DEPTH AVG.      2
DAYS >= 1.0         2

DEGREE_DAYS
HEATING TOTAL    1491              1373     118
 SINCE 7/1       3047              3246    -199
COOLING TOTAL       0                 0       0
 SINCE 1/1        562               472      90
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.4
RESULTANT WIND SPEED/DIRECTION   2/264
HIGHEST WIND SPEED/DIRECTION    36/300    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    48/230    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.20
NUMBER OF DAYS FAIR           24
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       2
LIGHT SNOW                6     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      2
HAZE                      5

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

LOOKING AHEAD TO JANUARY 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 32 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 9 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 33
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 11 ABOVE. THE AVERAGE
MONTHLY PRECIPITATION IS 0.48 INCHES.

$$



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