Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 010922
CLMBYG

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE JOHNSON COUNTY
AIRPORT NEAR BUFFALO 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 CLIMATIC
DATA CENTER (HTTP://WWW.NCDC.NOAA.GOV/OL/CLIMATEDATA.HTML).
UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...SEPTEMBER WAS MUCH WETTER THAN NORMAL IN BUFFALO...

THE AVERAGE TEMPERATURE FOR BUFFALO IN SEPTEMBER WAS 58.6
DEGREES...WHICH WAS 0.4 DEGREES ABOVE NORMAL. THE WARMEST READING
OF THE MONTH WAS 92 DEGREES ON THE 2ND. A NEW RECORD HIGH OF 89
DEGREES WAS SET ON THE 11TH...BREAKING THE PREVIOUS RECORD OF
87...SET IN 2011. A NEW RECORD HIGH OF 91 DEGREES WAS SET ON THE
12TH...TYING THE PREVIOUS RECORD SET IN 2004. THE COLDEST READING
WAS 36 DEGREES ON THE 17TH...20TH...AND THE 26TH. A NEW RECORD LOW
OF 37 DEGREES WAS SET ON THE 19TH...BREAKING THE PREVIOUS RECORD OF
38...SET IN 2010.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.79 INCHES...WHICH WAS 137
PERCENT OF NORMAL. THIS MAKES IT THE 4TH WETTEST SEPTEMBER ON
RECORD. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS ON THE
13TH...WHEN 0.63 INCHES FELL. 0.47 OF AN INCH OF PRECIPITATION
FELL ON THE 15TH...BREAKING THE PREVIOUS RECORD OF 0.18 SET IN 2006.
0.23 OF AN INCH OF PRECIPITATION FELL ON THE 25TH...BREAKING THE
PREVIOUS RECORD OF 0.11 SET IN 2013. THE HIGHEST WIND GUST WAS 42
MPH ON THE 1ST.

...THE BUFFALO WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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              98   09/04/1998
 LOW               19   09/12/2014
HIGHEST            92   09/02
LOWEST             36   09/26
                        09/20
                        09/17
AVG. MAXIMUM     69.7              71.4    -1.7
AVG. MINIMUM     47.5              45.0     2.5
MEAN             58.6              58.2     0.4
DAYS MAX >= 90      3
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.34   2013
 MINIMUM         0.11   2015
TOTALS           1.79              1.31    0.48
DAILY AVG.       0.06
DAYS >= .01         7
DAYS >= .10         5
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.63   09/14 TO 09/14

DEGREE_DAYS
HEATING TOTAL     277               249      28
 SINCE 7/1        299               314     -15
COOLING TOTAL      90                45      45
 SINCE 1/1        622               491     131
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.4
HIGHEST WIND SPEED/DIRECTION    32/330    DATE  09/01
HIGHEST GUST SPEED/DIRECTION    42/340    DATE  09/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     48

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      1
HAZE                     10

-  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 63 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 39 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 48 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 16 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 0.93 INCHES.

$$


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