955
CXUS55 KRIW 011740
CLMRKS
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1107 AM MDT TUE SEP 01 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR ROCK SPRINGS FOR THE
MONTH OF AUGUST 2026...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 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 WETTER AND WARMER THAN NORMAL IN AUGUST
THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN AUGUST WAS 70.6 DEGREES
WHICH WAS 3.3 DEGREES ABOVE NORMAL. IT WAS THE 4TH WARMEST AUGUST ON
RECORD. THE WARMEST READING FOR THE MONTH WAS 97 DEGREES ON THE 2ND
AND BROKE THE 2024 RECORD OF 94. IT ALSO SET A NEW ALL-TIME MONTHLY
HIGH FOR AUGUST. PREVIOUSLY IT WAS 96 DEGREES SET IN 2003 AND 2024.
THE 1ST HIGH OF 94 TIED 2008. THE 7TH HIGH OF 95 BROKE 92 DEGREES
FROM 1990, 2001 AND 2024. THE 8TH HIGH OF 92 TIED 1990 AND 2012. THE
21ST HIGH OF 93 BROKE 92 FROM 2003. THE HIGH OF 90 ON THE 27TH TIED
2011. THE COLDEST TEMPERATURE WAS 45 DEGREES ON THE 4TH.
PRECIPITATION FOR THE MONTH WAS 0.85 INCHES...WHICH WAS 152 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 29TH WITH 0.33
INCHES AND BROKE THE 1949 RECORD OF 0.24 INCHES. THE HIGHEST WIND
GUST WAS 67 MPH FROM THE SOUTHWEST ON THE 29TH.
...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST
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 97 08/02/2026
LOW 33 08/31/1962
HIGHEST 97R 08/02
LOWEST 45 08/04
AVG. MAXIMUM 85.3 81.5 3.8
AVG. MINIMUM 55.9 53.1 2.8
MEAN 70.6 67.3 3.3
DAYS MAX >= 90 10
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.12 1963
MINIMUM 0.01 2012
TOTALS 0.85 0.56 0.29 0.23
DAILY AVG. 0.03 0.02 0.01
DAYS >= .01 5
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.33 08/29 TO 08/29
STORM TOTAL 0.33
DEGREE DAYS
HEATING TOTAL 10 38 -28
SINCE 7/1 14 56 -42
COOLING TOTAL 190 109 81
SINCE 1/1 537 309 228
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 9.4
RESULTANT WIND SPEED/DIRECTION 5/250
HIGHEST WIND SPEED/DIRECTION 43/260 DATE 08/20
43/260 08/29
HIGHEST GUST SPEED/DIRECTION 67/250 DATE 08/29
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.16
NUMBER OF DAYS FAIR 25
NUMBER OF DAYS PC 6
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 38
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 8 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 2
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 5 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 SEPTEMBER 2026. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 77 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 49 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 64
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 39. THE AVERAGE MONTHLY
PRECIPITATION IS 0.79 INCHES.
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