Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011509
CLMBYG

CXUS55 KRIW 011421 CLMBYG


CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
758 AM MDT THU OCT 1 2020

PRELIMINARY MONTHLY CLIMATE SUMMARY FOR THE JOHNSON COUNTY AIRPORT
NEAR BUFFALO FOR THE MONTH OF SEPTEMBER 2020...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2020 WILL BE
AVAILABLE APPROXIMATELY IN 60 DAYS FROM THE NATIONAL CENTERS FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-
WEB/DATASETS). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE
INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

THE AVERAGE TEMPERATURE FOR BUFFALO IN SEPTEMBER WAS 61.6 DEGREES...
WHICH WAS 3.4 DEGREES ABOVE NORMAL. THIS MAKES IT THE 12TH WARMEST
SEPTEMBER ON RECORD. THE WARMEST READING OF THE MONTH WAS 99 DEGREES
ON THE 5TH. WHICH SET A NEW RECORD MONTHLY HIGH THAT BROKE THE
PREVIOUS MONTHLY HIGH OF 95 SET IN 2013. THE COLDEST DAY OF THE
MONTH WAS ON THE 9TH WITH A LOW 27 DEGREES WHICH SET A NEW DAILY
RECORD LOW AS THAT 27 BROKE A 36 RECORD SET IN 2007. SEVERAL DAILY
RECORDS WERE EITHER BROKEN OR TIED DURING SEPTEMBER. ON THE 7TH A 33
BROKE A 38 RECORD SET IN 2008. THE 8TH SAW A 30 BROKE A 33 SET IN
2008. ON THE 14TH A 91 BROKE A 90 SET IN 2009. THE 24TH SAW A 91
BREAK AN 87 SET IN 2001.

TOTAL PRECIPITATION FOR THE MONTH WAS 0.89 INCHES...WHICH WAS 68
PERCENT OF NORMAL. THIS MAKES IT THE 10TH DRIEST SEPTEMBER ON
RECORD. THE WETTEST 24 HOUR PERIOD OF THE MONTH WAS 0.73
INCHES...WHICH OCCURRED ON THE 7TH. THE HIGHEST WIND GUST WAS 64 MPH
ON THE 2ND.

...THE BUFFALO WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              99   09/05/2020
 LOW               19   09/12/2014
HIGHEST            99R  09/05
LOWEST             27   09/09
AVG. MAXIMUM     75.6              71.4     4.2
AVG. MINIMUM     47.6              45.0     2.6
MEAN             61.6              58.2     3.4
DAYS MAX >= 90      4
DAYS MAX <= 32      0
DAYS MIN <= 32      2
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.34   2013
 MINIMUM         0.11   2015
TOTALS           0.89              1.31   -0.42
DAILY AVG.       0.03
DAYS >= .01         3
DAYS >= .10         2
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.73   09/07 TO 09/07

DEGREE_DAYS
HEATING TOTAL     169               249     -80
 SINCE 7/1        192               314    -122
COOLING TOTAL      75                45      30
 SINCE 1/1        708               491     217
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.1
HIGHEST WIND SPEED/DIRECTION    43/330    DATE  09/02
HIGHEST GUST SPEED/DIRECTION    64/340    DATE  09/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.10
NUMBER OF DAYS FAIR           25
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     39

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
  1
  0
  0
  2
  0
  0
HAZE                      7

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

LOOKING AHEAD TO OCTOBER 2020...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 53
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 30 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.93 INCHES.
$$



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