Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012342
CLMWRL

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
442 PM MST MON JAN 1 2018

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR WORLAND MUNICIPAL AIRPORT
FOR THE MONTH OF DECEMBER 2017...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2017 WILL BE
AVAILABLE APPROXIMATELY IN FEBRUARY 2018 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...

...WORLAND WAS WETTER THAN NORMAL IN DECEMBER...

THE AVERAGE TEMPERATURE FOR WORLAND IN DECEMBER WAS 17.9 DEGREES...
WHICH WAS 0.4 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH
WAS 59 DEGREES ON THE 3RD. THE COLDEST READING WAS -24
DEGREES ON THE 24TH. NO TEMPERATURE RECORDS WERE SET DURING THE
MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.44 OF AN INCH...WHICH WAS
191 PERCENT OF NORMAL. THIS MAKES IT THE 7TH WETTEST DECEMBER ON
RECORD.
THE WETTEST 24 HOUR PERIOD WAS THE 16TH...WHEN 0.29 INCHES FELL.
THIS BROKE THE PREVIOUS RECORD OF 0.14 INCHES SET IN 1975.
THE HIGHEST WIND GUST WAS 51 MPH ON THE 4TH.

...THE WORLAND WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1947 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              64   12/10/1981
 LOW              -50   12/21/1990
HIGHEST            59   12/03
LOWEST            -24   12/24
AVG. MAXIMUM     30.9              30.6     0.3
AVG. MINIMUM      4.9               4.5     0.4
MEAN             17.9              17.5     0.4
DAYS MAX >= 90      0
DAYS MAX <= 32     15
DAYS MIN <= 32     31
DAYS MIN <= 0       9

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.88   MM
 MINIMUM         0.00   2006
TOTALS           0.44              0.23    0.21
DAILY AVG.       0.01
DAYS >= .01         6
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.29   12/16 TO 12/16

DEGREE_DAYS
HEATING TOTAL    1452              1471     -19
 SINCE 7/1       3371              3363       8
COOLING TOTAL       0                 0       0
 SINCE 1/1        588               535      53
.................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
RESULTANT WIND SPEED/DIRECTION   1/223
HIGHEST WIND SPEED/DIRECTION    39/330    DATE  12/04
HIGHEST GUST SPEED/DIRECTION    51/330    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     76

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                       3
LIGHT SNOW               13     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      3
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 2018...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 30 DEGREES... AND THE AVERAGE LOW TEMPERATURE
IS 3 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 32
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 6 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.45 INCHES.

$$



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