Climatological Report (Monthly)
Issued by NWS
Issued by NWS
220
CXUS55 KRIW 012058
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
258 PM MDT MON SEP 01 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 85 08/17/2020
LOW 25 08/31/2005
HIGHEST 80 08/13
08/21
08/23
LOWEST 30 08/09
AVG. MAXIMUM 72.6 70.7 1.9
AVG. MINIMUM 38.5 37.0 1.5
MEAN 55.5 53.9 1.6
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 1
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.37 2023
MINIMUM 0.13 2012
TOTALS 1.09 1.34 -0.25 1.25
DAILY AVG. 0.04 0.04 -0.00
DAYS >= .01 8
DAYS >= .10 2
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.83 08/27 TO 08/28
STORM TOTAL 0.68
DEGREE DAYS
HEATING TOTAL 285 346 -61
SINCE 7/1 516 641 -125
COOLING TOTAL 0 0 0
SINCE 1/1 1 0 1
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WIND (MPH)
AVERAGE WIND SPEED 2.3
RESULTANT WIND SPEED/DIRECTION 0/320
HIGHEST WIND SPEED/DIRECTION 20/280 DATE 08/04
HIGHEST GUST SPEED/DIRECTION 42/140 DATE 08/04
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.00
NUMBER OF DAYS FAIR 31
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 55
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 8 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 0 FOG W/VIS <= 1/4 MILE 0
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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