027
CXUS55 KRIW 021726
CLMRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1111 AM MDT MON JUN 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON FOR THE MONTH OF
MAY 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 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 DRIER THAN NORMAL IN MAY.
THE AVERAGE TEMPERATURE FOR RIVERTON IN MAY WAS 54.7 DEGREES WHICH
WAS 1.5 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS
84 DEGREES ON THE 12TH. THE HIGH ON THE 10TH OF 81 TIED THE 2012
RECORD. THE COLDEST READING WAS 31 DEGREES ON THE 2ND.
PRECIPITATION FOR THE MONTH WAS 1.14 INCHES...WHICH IS 97 PERCENT OF
NORMAL. THE WETTEST 24-HOURS WAS THE 5TH-6TH WHEN 0.53 INCHES FELL.
THE 13TH HAD 0.30 INCHES AND BROKE THE 1999 RECORD OF 0.13 INCHES.
SNOWFALL FOR THE MONTH WAS 0.9 INCHES. THE SNOWIEST DAY WAS THE 6TH
WITH 0.9 INCHES AND BROKE THE 2010 RECORD OF 0.5 INCHES. THE HIGHEST
WIND GUST WAS 51 MPH FROM THE SOUTHWEST AND OCCURRED ON THE 11TH.
..THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF MAY 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 93 05/29/2003
LOW 19 05/09/2002
HIGHEST 84 05/12
LOWEST 31 05/02
AVG. MAXIMUM 69.1 66.8 2.3
AVG. MINIMUM 40.3 39.5 0.8
MEAN 54.7 53.2 1.5
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 4
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.32 2011
MINIMUM 0.18 2006
TOTALS 1.14 1.92 -0.78 2.29
DAILY AVG. 0.04 0.06 -0.02
DAYS >= .01 8
DAYS >= .10 4
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.53 05/05 TO 05/06
STORM TOTAL 0.36
SNOWFALL (INCHES)
TOTALS 0.9 MM MM
SINCE 7/1 30.7 MM MM
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 319 375 -56
SINCE 7/1 7156 7812 -656
COOLING TOTAL 6 8 -2
SINCE 1/1 6 8 -2
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 8.5
RESULTANT WIND SPEED/DIRECTION 2/000
HIGHEST WIND SPEED/DIRECTION 39/230 DATE 05/11
HIGHEST GUST SPEED/DIRECTION 51/230 DATE 05/11
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.26
NUMBER OF DAYS FAIR 20
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 55
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 6 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 2 SLEET 0
FOG 6 FOG W/VIS <= 1/4 MILE 1
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 73 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 45 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 84
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 52. THE AVERAGE MONTHLY
PRECIPITATION IS 0.94 INCHES.
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