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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
553 PM MST MON NOV 2 2009
*** DOWNTOWN RIVERTON SEES 3RD COLDEST AND 4TH SNOWIEST OCTOBER
ON RECORD ***
OCTOBER 2009 WAS A CHILLY MONTH FOR RIVERTON WYOMING...AS DOWNTOWN
RIVERTON SAW AN AVERAGE OCTOBER TEMPERATURE OF 38.2 DEGREES...WHICH
WAS 6.7 DEGREES BELOW NORMAL. THIS TIES OCTOBER OF 1969 AS THE 3RD
COLDEST OCTOBER ON RECORD FOR DOWNTOWN RIVERTON. THE COLDEST OCTOBER
ON RECORD WAS IN 1919...WHEN THE AVERAGE TEMPERATURE FOR THE MONTH
WAS 32.7 DEGREES. THE 2ND COLDEST OCTOBER ON RECORD FOR DOWNTOWN
RIVERTON WAS IN 1925...WHEN THE AVERAGE TEMPERATURE FOR THE MONTH WAS
37.8 DEGREES.
DOWNTOWN RIVERTON SAW 2.30 INCHES OF PRECIPITATION FALL THROUGH THE
MONTH OF OCTOBER...WELL ABOVE THE OCTOBER AVERAGE OF 0.91 INCHES OF
PRECIPITATION...AND MAKING OCTOBER 2009 THE 7TH WETTEST OCTOBER ON
RECORD. THE WETTEST OCTOBER ON RECORD FOR DOWNTOWN RIVERTON WAS IN
1912...WHEN 5.06 INCHES OF PRECIPITATION FELL.
DOWNTOWN RIVERTON'S 19.7 INCHES OF SNOWFALL WAS ALMOST 5 1/2 TIMES
MORE THAN ITS AVERAGE OCTOBER SNOWFALL OF 3.60 INCHES...AND MAKES
OCTOBER 2009 THE 4TH SNOWIEST ON RECORD. ONLY THREE OTHER OCTOBERS
ON RECORD HAVE SEEN MORE SNOWFALL...OCTOBER OF 1919 (23.5 INCHES)...
OCTOBER OF 1971 (23.1 INCHES)...AND OCTOBER OF 1928 (22.0 INCHES).
LOOKING AHEAD TO NOVEMBER 2009: THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 52 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 21 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 35
DEGREES...AND THE AVERAGE LOW IS 7 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 0.47 INCHES.
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