Climatological Report (Monthly)
Issued by NWS
Issued by NWS
000 CXUS55 KRIW 021621 CLMP60 CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 1021 AM MDT MON OCT 02 2023 ................................... ...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1998 TO 2023 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 83 09/07/2022 LOW 13 09/24/2000 HIGHEST 71 09/01 LOWEST 26 09/29 AVG. MAXIMUM 61.3 60.5 0.8 AVG. MINIMUM 32.9 30.3 2.6 MEAN 47.1 45.4 1.7 DAYS MAX >= 90 0 DAYS MAX <= 32 0 DAYS MIN <= 32 14 DAYS MIN <= 0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 4.09 2013 MINIMUM 0.21 2018 TOTALS 3.62 1.57 2.05 1.62 DAILY AVG. 0.12 0.05 0.07 DAYS >= .01 10 DAYS >= .10 7 DAYS >= .50 3 DAYS >= 1.00 1 GREATEST 24 HR. TOTAL 1.57 09/20 TO 09/21 STORM TOTAL 1.20 DEGREE DAYS HEATING TOTAL 496 588 -92 SINCE 7/1 1029 1230 -201 COOLING TOTAL 0 0 0 SINCE 1/1 0 0 0 .............................................................. WIND (MPH) AVERAGE WIND SPEED 1.9 RESULTANT WIND SPEED/DIRECTION 0/070 HIGHEST WIND SPEED/DIRECTION 17/280 DATE 09/08 HIGHEST GUST SPEED/DIRECTION 32/200 DATE 09/01 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.00 NUMBER OF DAYS FAIR 28 NUMBER OF DAYS PC 0 NUMBER OF DAYS CLOUDY 0 AVERAGE RH (PERCENT) 69 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 2 MIXED PRECIP 0 HEAVY RAIN 1 RAIN 5 LIGHT RAIN 10 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. $$