Climatological Report (Monthly)
Issued by NWS Riverton, WY

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CXUS55 KRIW 012038
CLMRIW

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
135 PM MST THU JAN 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON REGIONAL AIRPORT
FOR THE MONTH OF DECEMBER 2014...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2014 WILL BE
AVAILABLE APPROXIMATELY IN FEBRUARY 2015 FROM THE NATIONAL CLIMATIC
DATA CENTER (HTTP://WWW.NCDC.NOAA.GOV/OL/CLIMATEDATA.HTML).
UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.CRH.NOAA.GOV/RIW/CLIMATE/...

...RIVERTON WAS WARMER AND WETTER THAN NORMAL IN DECEMBER....

THE AVERAGE TEMPERATURE FOR RIVERTON IN DECEMBER WAS 22.7 DEGREES...
WHICH WAS 2.9 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 53 DEGREES ON THE 2ND...7TH...AND 13TH. THE COLDEST
READING WAS 23 BELOW ON THE 31ST. TWO RECORD DAILY LOW TEMPERATURES
WERE SET IN DECEMBER...21 BELOW ON THE 30TH...AND 23 BELOW ON THE
31ST.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.65 OF AN INCH...WHICH WAS
203 PERCENT OF NORMAL...AND THE WETTEST DECEMBER ON THE BOOKS SINCE
RECORDS STARTED IN 1997. THE WETTEST 24 HOUR PERIOD OCCURRED ON THE
14TH AND 15TH...WHEN 0.24 OF AN INCH OF PRECIPITATION FELL. THE
HIGHEST WIND GUST WAS 42 MPH...WHICH OCCURRED ON THE 22ND.

...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              60   12/02/2012
 LOW              -29   12/21/1998
HIGHEST            53   12/13
                        12/07
                        12/02
LOWEST            -23   12/31
AVG. MAXIMUM     32.4              31.8     0.6
AVG. MINIMUM     12.9               7.8     5.1
MEAN             22.7              19.8     2.9
DAYS MAX >= 90      0
DAYS MAX <= 32     15
DAYS MIN <= 32     31
DAYS MIN <= 0       4

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.62   2007
 MINIMUM            T   1998
                        2001
TOTALS           0.65R             0.32    0.33
DAILY AVG.       0.02              0.01    0.01
DAYS >= .01         8
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.24   12/14 TO 12/15
 STORM TOTAL       MM
 (MM/DD(HH))

SNOWFALL (INCHES)
TOTALS            6.9                MM      MM
SINCE 7/1        12.4                MM      MM
SNOWDEPTH AVG.      1
DAYS >= 1.0         3

DEGREE_DAYS
HEATING TOTAL    1304              1401     -97
 SINCE 7/1       3081              3317    -236
COOLING TOTAL       0                 0       0
 SINCE 1/1        431               494     -63
.................................................

WIND (MPH)
AVERAGE WIND SPEED              6.3
RESULTANT WIND SPEED/DIRECTION   3/312
HIGHEST WIND SPEED/DIRECTION    32/300    DATE  12/21
HIGHEST GUST SPEED/DIRECTION    42/350    DATE  12/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)    2
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     71

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                2     SNOW                       2
LIGHT SNOW               11     SLEET                      0
FOG                      16     FOG W/VIS <= 1/4 MILE      6
HAZE                     11

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

LOOKING AHEAD TO JANUARY 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 31 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 7 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 32
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 10. THE AVERAGE MONTHLY
PRECIPITATION IS 0.24 INCHES.

$$




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