Climatological Report (Monthly)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
265
CXUS55 KRIW 012012
CLMRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
212 PM MDT WED OCT 01 2025
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...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 100 09/04/2022
LOW 21 09/27/1996
09/27/1996
HIGHEST 88 09/02
09/03
LOWEST 40 09/06
09/16
AVG. MAXIMUM 77.2 74.0 3.2
AVG. MINIMUM 48.3 44.4 3.9
MEAN 62.8 59.2 3.6
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.01 2013
MINIMUM 0.01 2010
TOTALS 0.99 0.77 0.22 0.07
DAILY AVG. 0.03 0.03 0.00
DAYS >= .01 3
DAYS >= .10 1
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.91 09/22 TO 09/22
STORM TOTAL 0.91
SNOWFALL (INCHES)
TOTALS 0.0 MM MM
SINCE 7/1 0.0 MM MM
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 97 205 -108
SINCE 7/1 100 241 -141
COOLING TOTAL 37 31 6
SINCE 1/1 611 499 112
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WIND (MPH)
AVERAGE WIND SPEED 7.9
RESULTANT WIND SPEED/DIRECTION 2/330
HIGHEST WIND SPEED/DIRECTION 38/250 DATE 09/21
HIGHEST GUST SPEED/DIRECTION 51/260 DATE 09/15
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.15
NUMBER OF DAYS FAIR 26
NUMBER OF DAYS PC 3
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 47
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 1 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.
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