064
CXUS55 KRIW 012111
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
258 PM MDT MON SEP 01 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER 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
..LANDER WAS WARMER AND DRIER THAN NORMAL IN AUGUST.
THE AVERAGE TEMPERATURE FOR LANDER IN AUGUST WAS 71 DEGREES WHICH
WAS 1.2 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS
99 DEGREES ON THE 20TH AND BROKE THE PREVIOUS RECORD OF 94 SET IN
2024, 2019, 2003 AND 1960. THE 19TH HIGH OF 97 BROKE 96 DEGREES FROM
2013. THE COLDEST TEMPERATURE WAS 49 DEGREES ON THE 9TH AND 10TH.
PRECIPITATION FOR THE MONTH WAS 0.47 INCHES...WHICH IS 90 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 27TH WHEN 0.28 INCHES OF
PRECIPITATION FELL. NO PRECIPITATION RECORDS WERE BROKEN THIS MONTH.
THE HIGHEST WIND GUST WAS 53 MPH AND OCCURRED ON THE 14TH FROM THE
SOUTHWEST.
..THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 101 08/05/1979
LOW 23 08/25/1910
HIGHEST 99 08/20
LOWEST 49 08/01
08/09
08/10
AVG. MAXIMUM 86.5 85.8 0.7
AVG. MINIMUM 55.5 53.8 1.7
MEAN 71.0 69.8 1.2
DAYS MAX >= 90 12
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 1.61 2014
MINIMUM 0.00 1970
TOTALS 0.47 0.52 -0.05 0.74
DAILY AVG. 0.02 0.02 0.00
DAYS >= .01 5
DAYS >= .10 2
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.28 08/27 TO 08/27
STORM TOTAL 0.28
SNOWFALL (INCHES)
TOTALS 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 3 25 -22
SINCE 7/1 5 37 -32
COOLING TOTAL 195 174 21
SINCE 1/1 527 452 75
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 6.6
RESULTANT WIND SPEED/DIRECTION 2/270
HIGHEST WIND SPEED/DIRECTION 40/220 DATE 08/14
HIGHEST GUST SPEED/DIRECTION 53/220 DATE 08/14
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.13
NUMBER OF DAYS FAIR 28
NUMBER OF DAYS PC 2
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 38
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 5 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 3
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 3 FOG W/VIS <= 1/4 MILE 1
HAZE 2
- 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 67
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 39. THE AVERAGE MONTHLY
PRECIPITATION IS 0.98 INCHES. THE AVERAGE SNOWFALL IS 1.5 INCHES.
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