Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 020003
CLMRKS

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SWEETWATER COUNTY
AIRPORT NEAR ROCK SPRINGS 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

...ROCK SPRINGS WAS SLIGHTLY COLDER AND MUCH DRIER THAN NORMAL IN
DECEMBER...

THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN DECEMBER WAS 19.5
DEGREES...WHICH WAS 1.6 DEGREES BELOW NORMAL. THE WARMEST READING
OF THE MONTH WAS 42 DEGREES ON THE 16TH...AND THE COLDEST WAS 9
BELOW ZERO ON THE 8TH. NO RECORD HIGHS OR LOWS WERE SET IN DECEMBER.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.08 INCHES...WHICH WAS 0.42
INCHES BELOW NORMAL...OR ONLY 16 PERCENT OF NORMAL FOR THE MONTH.
THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE 10TH WHEN 0.06 INCHES
FELL. NO PRECIPITATION RECORDS WERE SET THIS MONTH.

THE HIGHEST WIND GUST WAS 59 MPH ON THE 25TH.

...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              58   12/16/2013
 LOW              -29   12/22/1990
                        12/21/1990
                        12/31/1978
HIGHEST            42   12/16
LOWEST             -9   12/08
AVG. MAXIMUM     28.8              29.8    -1.0
AVG. MINIMUM     10.2              12.5    -2.3
MEAN             19.5              21.1    -1.6
DAYS MAX >= 90      0
DAYS MAX <= 32     19
DAYS MIN <= 32     31
DAYS MIN <= 0       5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.78   1975
 MINIMUM         0.00   1962
TOTALS           0.08              0.50   -0.42
DAILY AVG.       0.00              0.02   -0.02
DAYS >= .01         2
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.06   12/10 TO 12/10

DEGREE_DAYS
HEATING TOTAL    1405              1359      46
 SINCE 7/1       3125              3352    -227
COOLING TOTAL       0                 0       0
 SINCE 1/1        354               286      68
.................................................

WIND (MPH)
AVERAGE WIND SPEED              12.4
RESULTANT WIND SPEED/DIRECTION  10/247
HIGHEST WIND SPEED/DIRECTION    48/260    DATE  12/25
HIGHEST GUST SPEED/DIRECTION    59/260    DATE  12/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       4
LIGHT SNOW               16     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      2
HAZE                      6

-  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 30
DEGREES... AND THE AVERAGE LOW TEMPERATURE IS 12 DEGREES. THE
AVERAGE HIGH BY THE END OF THE MONTH IS 31 DEGREES...AND THE AVERAGE
LOW TEMPERATURE IS 12 DEGREES. THE AVERAGE MONTHLY PRECIPITATION IS
0.45 INCHES.

$$



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