659
CXUS55 KRIW 012114
CLMRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
258 PM MDT MON SEP 01 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON FOR THE MONTH OF
AUGUST 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 2025 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 WARMER AND WETTER THAN NORMAL IN AUGUST.
THE AVERAGE TEMPERATURE FOR RIVERTON IN AUGUST WAS 71.2 DEGREES
WHICH WAS 1.6 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 99 DEGREES ON THE 20TH AND BROKE THE 2019 RECORD OF 94.
THIS HIGH OF 99 DEGREES ALSO TIED THE AUGUST MONTHLY ALL-TIME HIGH
TEMPERATURE FROM SEVERAL PREVIOUS YEARS. THE HIGH ON THE 7TH OF 95
BROKE THE 2005 RECORD OF 94. THE HIGH ON THE 19TH OF 97 BROKE THE
RECORD OF 96 DEGREES FROM 2013 AND 2019. THE COLDEST READING WAS 47
DEGREES ON THE 9TH. THIS BROKE THE 2009 RECORD OF 49 DEGREES. THE
LOW ON THE 3RD OF 50 BROKE THE 2017 RECORD OF 51.
PRECIPITATION FOR THE MONTH WAS 0.52 INCHES...WHICH IS 124 PERCENT
OF NORMAL. THE WETTEST 24-HOURS WAS THE 27TH WHEN 0.40 INCHES FELL.
THIS BROKE THE 2014 RECORD OF 0.07 INCHES. THE 28TH HAD 0.09 INCHES
AND TIED 2010. THE HIGHEST WIND GUST WAS 68 MPH FROM THE SOUTHWEST
AND OCCURRED ON THE 15TH.
..THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 99 08/14/2003
08/06/2001
LOW 36 08/31/2020
HIGHEST 99R 08/20
LOWEST 47 08/09
AVG. MAXIMUM 86.8 85.5 1.3
AVG. MINIMUM 55.6 53.7 1.9
MEAN 71.2 69.6 1.6
DAYS MAX >= 90 10
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 1.36 2023
MINIMUM 0.01 2020
TOTALS 0.52 0.42 0.10 0.32
DAILY AVG. 0.02 0.01 0.01
DAYS >= .01 4
DAYS >= .10 1
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.40 08/27 TO 08/27
STORM TOTAL 0.40
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 3 26 -23
SINCE 7/1 3 34 -31
COOLING TOTAL 183 169 14
SINCE 1/1 574 468 106
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 8.3
RESULTANT WIND SPEED/DIRECTION 2/010
HIGHEST WIND SPEED/DIRECTION 48/210 DATE 08/15
HIGHEST GUST SPEED/DIRECTION 68/200 DATE 08/15
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.10
NUMBER OF DAYS FAIR 29
NUMBER OF DAYS PC 2
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 39
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 9 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 2 FOG W/VIS <= 1/4 MILE 1
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 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 81 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 50 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 66
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 39. THE AVERAGE MONTHLY
PRECIPITATION IS 0.77 INCHES.
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