Climatological Report (Monthly)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
180
CXUS55 KRIW 011746
CLMRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1122 AM MDT TUE OCT 01 2024
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON FOR THE MONTH OF
SEPTEMBER 2024...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2024 WILL BE
AVAILABLE IN APPROXIMATELY 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
...RIVERTON WAS DRIER AND WARMER THAN NORMAL IN SEPTEMBER....
THE AVERAGE TEMPERATURE FOR RIVERTON IN SEPTEMBER WAS 64.2 DEGREES
WHICH WAS 5 DEGREES ABOVE NORMAL. THIS MONTH TIED WITH 2022 AS THE
SECOND WARMEST SEPTEMBER SINCE RECORDS BEGAN IN 1998. THE WARMEST
READING FOR THE MONTH WAS 91 DEGREES ON THE 2ND. THE COLDEST READING
WAS 35 DEGREES ON THE 22ND. NO TEMPERATURE RECORDS WERE BROKEN
EXCEPT THAT THE HIGH ON THE 29TH OF 90 DEGREES BROKE THE RECORD FOR
THE LATEST DAY OF THE YEAR WITH A HIGH OF 90 DEGREES OR MORE.
PREVIOUSLY IT WAS ON SEPTEMBER 26TH IN 2014
PRECIPITATION FOR THE MONTH WAS 0.07 INCHES...WHICH IS 9 PERCENT OF
NORMAL. THIS TIED FOR THE 3RD DRIEST SEPTEMBER SINCE RECORDS BEGAN
IN 1998. THE WETTEST 24-HOURS WAS THE 3RD-4TH WHEN 0.03 INCHES FELL.
NO PRECIPITATION RECORDS WERE BROKEN. THE HIGHEST WIND GUST WAS 52
MPH FROM THE SOUTHWEST AND OCCURRED ON THE 17TH.
...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 100 09/04/2022
LOW 21 09/27/1996
09/27/1996
HIGHEST 91 09/02
LOWEST 35 09/22
AVG. MAXIMUM 80.3 74.0 6.3
AVG. MINIMUM 48.0 44.4 3.6
MEAN 64.2 59.2 5.0
DAYS MAX >= 90 4
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.01 2013
MINIMUM 0.01 2010
TOTALS 0.07 0.77 -0.70 0.67
DAILY AVG. 0.00 0.03 -0.03
DAYS >= .01 5
DAYS >= .10 0
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.03 09/03 TO 09/04
09/11 TO 09/12
STORM TOTAL 0.02
SNOWFALL (INCHES)
TOTALS 0.0 MM MM
SINCE 7/1 0.0 MM MM
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 86 205 -119
SINCE 7/1 104 241 -137
COOLING TOTAL 67 31 36
SINCE 1/1 609 499 110
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 8.8
RESULTANT WIND SPEED/DIRECTION 3/290
HIGHEST WIND SPEED/DIRECTION 38/230 DATE 09/12
38/220 09/17
HIGHEST GUST SPEED/DIRECTION 52/210 DATE 09/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.04
NUMBER OF DAYS FAIR 30
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 37
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 6 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 0 FOG W/VIS <= 1/4 MILE 0
HAZE 3
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO OCTOBER 2024. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 66 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 38 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 51
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 25. THE AVERAGE MONTHLY
PRECIPITATION IS 0.83 INCHES.
$$