Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011029
CLMRKS

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
216 AM MDT SAT OCT 1 2016

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE SWEETWATER COUNTY
AIRPORT NEAR ROCK SPRINGS FOR THE MONTH OF SEPTEMBER 2016...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2016 WILL BE
AVAILABLE APPROXIMATELY IN NOVEMBER 2016 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

...ROCK SPRINGS WAS WETTER THAN NORMAL IN SEPTEMBER...

THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN SEPTEMBER WAS 57.2
DEGREES...WHICH WAS 0.7 DEGREES ABOVE NORMAL. THE WARMEST READING OF
THE MONTH WAS 83 DEGREES ON THE 1ST AND 2ND. THE COLDEST READING WAS
34 DEGREES ON THE 25TH. NO TEMPERATURE RECORDS WERE SET
DURING THE MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.59 INCHES...WHICH WAS 173
PERCENT OF NORMAL. THIS MAKES IT THE 8TH WETTEST SEPTEMBER ON
RECORD. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS THE 22ND AND
23RD...WHEN 1.19 OF AN INCH OF PRECIPITATION FELL. 1.09 OF AN INCH
FELL ON THE 22ND...BREAKING THE PREVIOUS RECORD OF 0.74...SET IN
2000. 0.27 OF AN INCH OF PRECIPITATION FELL ON THE 14TH...BREAKING
THE PREVIOUS RECORD OF 0.25...SET IN 1996. THE HIGHEST WIND GUST WAS
59 MPH ON THE 4TH.

...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              89   09/04/1995
                        09/03/1950
 LOW                5   09/18/1965
HIGHEST            83   09/02
                        09/01
LOWEST             34   09/25
AVG. MAXIMUM     70.4              70.3     0.1
AVG. MINIMUM     44.1              42.7     1.4
MEAN             57.2              56.5     0.7
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.67   1965
 MINIMUM            T   2012
TOTALS           1.59              0.92    0.67
DAILY AVG.       0.05              0.03    0.02
DAYS >= .01         6
DAYS >= .10         3
DAYS >= .50         1
DAYS >= 1.00        1
GREATEST
 24 HR. TOTAL    1.19   09/22 TO 09/23

DEGREE_DAYS
HEATING TOTAL     238               264     -26
 SINCE 7/1        297               328     -31
COOLING TOTAL      12                 9       3
 SINCE 1/1        354               286      68
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.9
RESULTANT WIND SPEED/DIRECTION   6/230
HIGHEST WIND SPEED/DIRECTION    44/210    DATE  09/13
HIGHEST GUST SPEED/DIRECTION    59/200    DATE  09/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     47

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       3
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       4     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

LOOKING AHEAD TO SEPTEMBER 2016...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 67 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 38 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 47 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 26 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 0.81 INCHES.

$$



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