299
CXUS55 KRIW 011648
CLMRKS
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1032 AM MDT MON JUN 01 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR ROCK SPRINGS FOR THE
MONTH OF MAY 2026...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2026 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
..ROCK SPRINGS WAS DRIER AND WARMER THAN NORMAL IN MAY
THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN MAY WAS 51.9 DEGREES
WHICH WAS 1.1 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 83 DEGREES ON THE 12TH. THIS BROKE 82 DEGREES FORM 1960.
THE 11TH HIT 82 AND BROKE 80 FROM 2007. THE COLDEST TEMPERATURE WAS
24 DEGREES ON THE 6TH. THE 18TH LOW OF 27 BROKE THE 2017 RECORD OF
28 DEGREES.
PRECIPITATION FOR THE MONTH WAS 0.40 INCHES...WHICH WAS 31 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 21ST WITH 0.20
INCHES. NO PRECIPITATION RECORDS WERE BROKEN. THE HIGHEST WIND GUST
WAS 65 MPH FROM THE NORTHEAST ON THE 18TH. THERE WAS ALSO A GUST TO
61 MPH FROM THE WEST ON THE 13TH.
..THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1948 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 90 05/31/2002
LOW 18 05/07/2010
05/05/2010
05/02/1954
HIGHEST 83 05/12
LOWEST 24 05/06
AVG. MAXIMUM 65.6 63.2 2.4
AVG. MINIMUM 38.1 38.4 -0.3
MEAN 51.9 50.8 1.1
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 10
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.67 1995
MINIMUM 0.00 1974
TOTALS 0.40 1.27 -0.87 0.34
DAILY AVG. 0.01 0.04 -0.03
DAYS >= .01 5
DAYS >= .10 1
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.20 05/21 TO 05/21
STORM TOTAL 0.20
SNOWFALL (INCHES)
TOTALS MM 2.7 MM
SINCE 7/1 MM 53.6 MM
SNOWDEPTH AVG. MM
DAYS >= 1.0 MM
DEGREE DAYS
HEATING TOTAL 402 442 -40
SINCE 7/1 6046 7905 -1859
COOLING TOTAL 2 2 0
SINCE 1/1 2 2 0
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 11.4
RESULTANT WIND SPEED/DIRECTION 4/240
HIGHEST WIND SPEED/DIRECTION 47/050 DATE 05/18
HIGHEST GUST SPEED/DIRECTION 65/050 DATE 05/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.27
NUMBER OF DAYS FAIR 22
NUMBER OF DAYS PC 6
NUMBER OF DAYS CLOUDY 3
AVERAGE RH (PERCENT) 45
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 1
LIGHT RAIN 9 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 2 SNOW 2
LIGHT SNOW 4 SLEET 0
FOG 5 FOG W/VIS <= 1/4 MILE 2
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO JUNE 2026. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 70 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 43 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 81
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 51. THE AVERAGE MONTHLY
PRECIPITATION IS 0.70 INCHES.
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