Climatological Report (Monthly)
Issued by NWS Riverton, WY

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CXUS55 KRIW 012238
CLMRIW

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
435 PM MDT WED NOV 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON REGIONAL AIRPORT
FOR THE MONTH OF OCTOBER 2017...

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

...RIVERTON WAS MUCH COLDER AND DRIER THAN NORMAL IN OCTOBER...

THE AVERAGE TEMPERATURE FOR RIVERTON IN OCTOBER WAS 43.3
DEGREES...WHICH WAS 1.8 DEGREES BELOW NORMAL. THIS MADE IT THE 4TH
COLDEST OCTOBER ON RECORD. THE WARMEST READING OF THE MONTH WAS 72
DEGREES ON THE 7TH. THE COLDEST READING WAS 14 DEGREES ON THE 31ST.
A RECORD LOW OF 24 DEGREES WAS SET ON THE 3RD...BREAKING THE 2009
RECORD OF 25 DEGREES.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.61 INCHES...WHICH WAS 69
PERCENT OF NORMAL. THE WETTEST 24 HOUR PERIOD WAS ON THE 2ND...WHEN
0.33 OF AN INCH FELL. 0.12 OF AN INCH OF PRECIPITATION FELL ON THE
14TH...BREAKING THE PREVIOUS RECORD OF 0.01...SET IN 2001. THE 26TH
HAD 0.04 INCHES OF PRECIPITATION...BREAKING THE RECORD OF 0.02 SET
IN 2011. SNOWFALL FOR OCTOBER WAS 2.7 INCHES. THE MOST SNOW FELL ON
THE 14TH...WHEN 1.9 INCHES FELL...WHICH BROKE THE 2013 RECORD OF 0.6
INCHES OF SNOW. THE HIGHEST WIND GUST WAS 59 MPH ON THE 31ST.

...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              82   10/02/2012
                        10/03/2010
                        10/09/2003
 LOW                0   10/10/2009
HIGHEST            72   10/07
LOWEST             14   10/31
AVG. MAXIMUM     57.0              57.8    -0.8
AVG. MINIMUM     29.7              32.5    -2.8
MEAN             43.3              45.1    -1.8
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     20
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.83   1998
 MINIMUM         0.03   2001
TOTALS           0.61              0.89   -0.28
DAILY AVG.       0.02              0.03   -0.01
DAYS >= .01         5
DAYS >= .10         2
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.33   10/02 TO 10/02
 STORM TOTAL       MM
 (MM/DD(HH))

SNOWFALL (INCHES)
TOTALS            2.7                MM      MM
SINCE 7/1         2.7                MM      MM
SNOWDEPTH AVG.      0
DAYS >= 1.0         1

DEGREE_DAYS
HEATING TOTAL     665               616      49
 SINCE 7/1        956               880      76
COOLING TOTAL       0                 0       0
 SINCE 1/1        547               494      53
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.3
RESULTANT WIND SPEED/DIRECTION   4/308
HIGHEST WIND SPEED/DIRECTION    48/300    DATE  10/31
HIGHEST GUST SPEED/DIRECTION    59/290    DATE  10/31

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.20
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     53

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

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

LOOKING AHEAD TO NOVEMBER 2017...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 50 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 27 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 35
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 12. THE AVERAGE MONTHLY
PRECIPITATION IS 0.50 INCHES.

$$



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