Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011039
CLMWRL

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
254 AM MDT SUN OCT 1 2017

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR WORLAND MUNICIPAL AIRPORT
FOR THE MONTH OF SEPTEMBER 2017...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2017 WILL BE
AVAILABLE APPROXIMATELY IN NOVEMBER 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...

...WORLAND WAS SLIGHTLY COOLER AND MUCH WETTER THAN NORMAL IN
SEPTEMBER...

THE AVERAGE TEMPERATURE FOR WORLAND IN SEPTEMBER WAS 57.5 DEGREES...
WHICH WAS 1.1 DEGREES BELOW NORMAL. THE WARMEST READING OF THE
MONTH WAS 95 DEGREES ON THE 2ND. THE COLDEST READING WAS 30 DEGREES
ON THE 20TH. NO TEMPERATURE RECORDS WERE SET DURING THE MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 2.07 OF AN INCH...WHICH WAS
244 PERCENT OF NORMAL. THIS MAKES IT THE 3RD WETTEST SEPTEMBER ON
RECORD. THE WETTEST 24 HOUR PERIOD WAS THE 15TH...WHEN 0.55
INCHES FELL. THIS SET A NEW RECORD...BREAKING THE PREVIOUS RECORD OF
0.41...SET IN 1960. THE HIGHEST WIND GUST WAS 36 MPH ON THE 18TH.

...THE WORLAND WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1947 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             100   09/06/1978
 LOW               15   09/25/1984
HIGHEST            95   09/02
LOWEST             30   09/20
AVG. MAXIMUM     72.1              74.5    -2.4
AVG. MINIMUM     42.9              42.7     0.2
MEAN             57.5              58.6    -1.1
DAYS MAX >= 90      5
DAYS MAX <= 32      0
DAYS MIN <= 32      1
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.63   2013
 MINIMUM            T   2012
                        1979
TOTALS           2.07              0.85    1.22
DAILY AVG.       0.07
DAYS >= .01         8
DAYS >= .10         6
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.55   09/15 TO 09/15

DEGREE_DAYS
HEATING TOTAL     268               221      47
 SINCE 7/1        269               257      12
COOLING TOTAL      52                29      23
 SINCE 1/1        588               535      53
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.8
RESULTANT WIND SPEED/DIRECTION   0/199
HIGHEST WIND SPEED/DIRECTION    26/350    DATE  09/18
HIGHEST GUST SPEED/DIRECTION    36/360    DATE  09/18

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           20
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       5
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      0
HAZE                      9

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

LOOKING AHEAD TO OCTOBER 2017...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 66 DEGREES... AND THE AVERAGE LOW
TEMPERATURE IS 36 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 54 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 25 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 0.69 INCHES.

$$


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