Climatological Report (Monthly)
Issued by NWS
Issued by NWS
227
CXUS55 KRIW 012012
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
212 PM MDT WED OCT 01 2025
...................................
...THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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 99 09/04/2022
LOW 7 09/22/1895
HIGHEST 89 09/10
LOWEST 38 09/16
AVG. MAXIMUM 77.3 74.6 2.7
AVG. MINIMUM 48.6 44.6 4.0
MEAN 62.9 59.6 3.3
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.64 1923
MINIMUM T 2010
TOTALS 1.20 0.98 0.22 0.40
DAILY AVG. 0.04 0.03 0.01
DAYS >= .01 7
DAYS >= .10 2
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.79 09/22 TO 09/22
STORM TOTAL 0.79
SNOWFALL (INCHES)
TOTALS 0.0 1.5 -1.5
SINCE 7/1 0.0 1.5 -1.5
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 99 195 -96
SINCE 7/1 104 233 -129
COOLING TOTAL 42 32 10
SINCE 1/1 569 484 85
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.0
RESULTANT WIND SPEED/DIRECTION 1/260
HIGHEST WIND SPEED/DIRECTION 54/180 DATE 09/11
HIGHEST GUST SPEED/DIRECTION 69/220 DATE 09/10
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.17
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 3 MIXED PRECIP 0
HEAVY RAIN 1 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 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$