176
CXUS55 KRIW 011734
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1107 AM MDT TUE SEP 01 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER 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
..LANDER WAS WARMER AND WETTER THAN NORMAL IN AUGUST.
THE AVERAGE TEMPERATURE FOR LANDER IN AUGUST WAS 72.5 DEGREES WHICH
WAS 2.7 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS
101 DEGREES ON THE 2ND AND BROKE THE 2024 RECORD OF 97. IT ALSO TIED
THE ALL-TIME MONTHLY HIGH SET IN 1979. THE 1ST HIGH OF 99 TIED 2000.
THE 8TH HIGH OF 98 TIED 1983. THE 9TH HIGH OF 96 BROKE THE 1983 AND
1992 RECORD OF 95. THE COLDEST TEMPERATURE WAS 46 DEGREES ON THE 5TH
AND 31ST.
PRECIPITATION FOR THE MONTH WAS 0.59 INCHES...WHICH IS 113 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 13TH...WITH 0.21
INCHES OF PRECIPITATION. NO PRECIPITATION RECORDS WERE BROKEN THIS
MONTH. THE HIGHEST WIND GUST WAS 53 MPH AND OCCURRED ON THE 24TH
FROM THE WEST.
..THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2026
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 101R 08/02
LOWEST 46 08/05
08/31
AVG. MAXIMUM 87.7 85.8 1.9
AVG. MINIMUM 57.4 53.8 3.6
MEAN 72.5 69.8 2.7
DAYS MAX >= 90 13
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 1.61 2014
MINIMUM 0.00 1970
TOTALS 0.59 0.52 0.07 0.47
DAILY AVG. 0.02 0.02 0.00
DAYS >= .01 9
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.21 08/13 TO 08/13
STORM TOTAL 0.21
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 3 37 -34
COOLING TOTAL 245 174 71
SINCE 1/1 670 452 218
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 6.7
RESULTANT WIND SPEED/DIRECTION 2/280
HIGHEST WIND SPEED/DIRECTION 40/200 DATE 08/24
HIGHEST GUST SPEED/DIRECTION 53/280 DATE 08/24
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.12
NUMBER OF DAYS FAIR 29
NUMBER OF DAYS PC 2
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 38
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 7 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 13 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 0
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 2026. 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 MONTHLY SNOWFALL IS 1.5
INCHES.
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