Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012110
CLMBYG

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE JOHNSON COUNTY
AIRPORT NEAR BUFFALO 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 CLIMATIC
DATA CENTER (HTTP://WWW.NCDC.NOAA.GOV/OL/CLIMATEDATA.HTML).
UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...BUFFALO EXPERIENCED ABOUT NORMAL CONDITIONS IN DECEMBER...

THE AVERAGE TEMPERATURE FOR BUFFALO IN DECEMBER WAS 27.0
DEGREES...WHICH WAS 1.1 DEGREES ABOVE NORMAL. THIS WAS THE 11TH
WARMEST DECEMBER ON RECORD AND 10TH COLDEST. THE WARMEST READING
OF THE MONTH WAS 70 DEGREES ON THE 12TH...WHICH ALSO BROKE THE
PREVIOUS RECORD OF 52 DEGREES SET IN 2010. OTHER NEW HIGH RECORDS
SET WERE: ON THE 3RD 57 DEGREES BROKE THE PREVIOUS RECORD OF 51
DEGREES SET IN 2007...ON THE 10TH 59 BROKE 58 SET IN 2014...AND
ON THE 15TH 60 BROKE 59 SET IN 2006. THE COLDEST READING WAS -8
DEGREES ON THE 31ST. THIS BROKE THE PREVIOUS RECORD OF -5 DEGREES
SET IN 2010. A RECORD LOW WAS ALSO BROKEN ON THE 26TH WHEN -5
DEGREES BROKE +5 DEGREES SET IN 2007.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.32 INCHES...WHICH WAS 80
PERCENT OF NORMAL. THIS MAKES IT THE 4TH WETTEST DECEMBER ON RECORD.
THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS ON THE 16TH...WHEN 0.27
INCHES FELL...WHICH ALSO SHATTERED THE PREVIOUS RECORD OF A TRACE
SET IN 2006.  A RECORD WAS ALSO BROKEN ON THE 23RD WHEN 0.01 INCHES
FELL BREAKING A TRACE SET IN 2009.  A TRACE RECORD WAS ALSO TIED ON
THE 25TH FROM 2009 AND A TRACE RECORD WAS TIED ON THE 27TH FROM 2005.
THE HIGHEST WIND GUST WAS 69 MPH ON THE 5TH.

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

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              70   12/12/2017
 LOW              -24   12/21/1998
HIGHEST            70R  12/12
LOWEST             -8   12/31
AVG. MAXIMUM     37.0              36.5     0.5
AVG. MINIMUM     17.0              15.2     1.8
MEAN             27.0              25.9     1.1
DAYS MAX >= 90      0
DAYS MAX <= 32     12
DAYS MIN <= 32     28
DAYS MIN <= 0       6

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.54   1999
 MINIMUM         0.00   2009
TOTALS           0.32              0.40   -0.08
DAILY AVG.       0.01
DAYS >= .01         4
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.27   12/16 TO 12/16

DEGREE_DAYS
HEATING TOTAL    1174              1213     -39
 SINCE 7/1       2836              3047    -211
COOLING TOTAL       0                 0       0
 SINCE 1/1        622               492     130
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.8
HIGHEST WIND SPEED/DIRECTION    52/320    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    69/320    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     51

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                       4
LIGHT SNOW               17     SLEET                      0
FOG                       7     FOG W/VIS <= 1/4 MILE      3
HAZE                     12

-  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 38 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 16 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 37
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 17 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.42 INCHES.

$$



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