Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 012000
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1137 AM MDT FRI SEP 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF AUGUST 2017...

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

...AUGUST WAS MUCH DRIER THAN NORMAL IN GREYBULL...

THE AVERAGE TEMPERATURE FOR GREYBULL IN AUGUST WAS 71.4 DEGREES...
WHICH WAS 0.6 DEGREES BELOW NORMAL. THIS MAKES IT THE 7TH COLDEST
AUGUST ON RECORD. THE WARMEST READING OF THE MONTH WAS 97 DEGREES ON
THE 28TH. THE COLDEST READING WAS 48 DEGREES ON THE 7TH...SETTING A
NEW RECORD LOW. THIS BROKE THE PREVIOUS RECORD OF 54...SET IN 2004.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.07...WHICH WAS 17 PERCENT OF
NORMAL.  THIS TIES 1999...2000 AND 2006 AS THE 4TH DRIEST AUGUST ON
RECORD. THE WETTEST 24 HOUR PERIOD WAS THE 13TH AND 15TH...WHEN 0.03
INCHES FELL BOTH DAYS. NO PRECIPITATION RECORDS WERE SET DURING THE
MONTH. THE HIGHEST WIND GUST WAS 45 MPH ON THE 13TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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             105   08/03/2001
 LOW               36   08/31/2005
HIGHEST            97   08/28
LOWEST             48   08/07
AVG. MAXIMUM     87.9              89.1    -1.2
AVG. MINIMUM     54.8              54.8     0.0
MEAN             71.4              72.0    -0.6
DAYS MAX >= 90     13
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.01   2014
 MINIMUM            T   2013
TOTALS           0.07              0.42   -0.35
DAILY AVG.       0.00              0.01   -0.01
DAYS >= .01         3
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.03   08/15 TO 08/15
                        08/13 TO 08/13

DEGREE_DAYS
HEATING TOTAL       0                15     -15
 SINCE 7/1          0                21     -21
COOLING TOTAL     206               230     -24
 SINCE 1/1        762               633     129
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.8
HIGHEST WIND SPEED/DIRECTION    36/320    DATE  08/13
HIGHEST GUST SPEED/DIRECTION    45/310    DATE  08/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.10
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     42

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       0
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       2     FOG W/VIS <= 1/4 MILE      0
HAZE                      6

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

LOOKING AHEAD TO SEPTEMBER 2017...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 84 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 50 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 37 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 0.88 INCHES.

$$


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