Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012047
CLMGEY

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL 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

...OCTOBER WAS THE DRIEST ON RECORD AND COLDER THAN NORMAL IN
GREYBULL...

THE AVERAGE TEMPERATURE FOR GREYBULL FOR THE MONTH WAS 45
DEGREES...1 DEGREE BELOW NORMAL...FOR THE 5TH COLDEST OCTOBER ON
RECORD. THE WARMEST READING OF THE MONTH WAS 77 DEGREES ON THE 20TH.
THIS TIED THE PREVIOUS RECORD FOR THE DAY...LAST SET IN 2014. THE
COLDEST READING WAS 14 DEGREES ON THE 31ST. A RECORD LOW OF 25
DEGREES WAS SET ON THE 15TH...BREAKING THE 2002 RECORD OF 28 DEGREES.

TOTAL PRECIPITATION FOR THE MONTH WAS A TRACE...MAKING IT THE DRIEST
OCTOBER ON RECORD. NORMAL PRECIPITATION FOR THE MONTH IS 0.60
INCHES. THERE WERE NO SIGNIFICANT RECORD BROKEN THIS MONTH. THE
HIGHEST WIND GUST WAS 58 MPH ON THE 26TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 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              86   10/10/2015
                        10/04/2010
                        10/09/2003
 LOW                9   10/31/2006
HIGHEST            77   10/20
LOWEST             14   10/31
AVG. MAXIMUM     60.1              59.9     0.2
AVG. MINIMUM     29.9              32.0    -2.1
MEAN             45.0              46.0    -1.0
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32     20
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.48   2011
 MINIMUM         0.01   2014
TOTALS              TR             0.60   -0.60
DAILY AVG.          T              0.02   -0.02
DAYS >= .01         0
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL       T   10/29 TO 10/29
                        09/30 TO 10/01
                        10/01 TO 10/01

DEGREE_DAYS
HEATING TOTAL     612               591      21
 SINCE 7/1        843               822      21
COOLING TOTAL       0                 0       0
 SINCE 1/1        824               669     155
.................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
HIGHEST WIND SPEED/DIRECTION    47/330    DATE  10/26
HIGHEST GUST SPEED/DIRECTION    58/330    DATE  10/26

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.10
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     51

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                       0     FOG W/VIS <= 1/4 MILE      0
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 53 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 26 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 34
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 10 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.30 INCHES.

$$



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