Climatological Report (Monthly)
Issued by NWS
Issued by NWS
000
CXUS55 KRIW 011853
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1235 PM MDT FRI SEP 01 2023
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF AUGUST 2023...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 2023 WILL BE
AVAILABLE APPROXIMATELY IN 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
...LAKE YELLOWSTONE WAS WARMER WITH RECORD RAINFALL IN AUGUST...
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN AUGUST WAS 54.5 DEGREES
WHICH IS 0.6 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH
WAS 81 DEGREES ON THE 15TH, 16TH AND 17TH. THE 15TH HIGH TIED 2003.
THE COLDEST READING OF THE MONTH WAS ON THE 31ST WITH 31 DEGREES.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 4.37 INCHES... WHICH WAS
326 PERCENT OF NORMAL AND THE FIRST WETTEST AUGUST SINCE RECORDS
STARTED IN 1998. THIS BROKE THE PREVIOUS MONTHLY RECORD OF 4.29
INCHES SET IN 2014. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS
THE 3RD-4TH WHEN 1.15 INCHES OF PRECIPITATION FELL. THE 3RD HAD 0.88
AND BROKE THE 2002 RECORD OF 0.50. THE 4TH HAD 0.41 INCHES AND BROKE
0.28 FROM 2003. THE 20TH HAD 0.83 INCHES AND BROKE THE 2021 RECORD
OF 0.34. THE 26TH HAD 0.28 INCHES AND BROKE THE 2004 RECORD OF 0.26.
THE HIGHEST WIND GUST WAS 34 MPH FROM THE SOUTHWEST ON THE 30TH.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST
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 85 08/17/2020
LOW 25 08/31/2005
HIGHEST 81 08/15
08/16
08/17
LOWEST 31 08/31
AVG. MAXIMUM 67.9 70.7 -2.8
AVG. MINIMUM 41.0 37.0 4.0
MEAN 54.5 53.9 0.6
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 1
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.29 2014
MINIMUM 0.13 2012
TOTALS 4.37R 1.34 3.03 2.76
DAILY AVG. 0.15 0.04 0.11
DAYS >= .01 18
DAYS >= .10 9
DAYS >= .50 3
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 1.15 08/03 TO 08/04
STORM TOTAL 0.88
DEGREE DAYS
HEATING TOTAL 321 346 -25
SINCE 7/1 533 641 -108
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 1.9
RESULTANT WIND SPEED/DIRECTION 0/090
HIGHEST WIND SPEED/DIRECTION 18/280 DATE 08/30
HIGHEST GUST SPEED/DIRECTION 34/240 DATE 08/30
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) 69
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 9
LIGHT RAIN 12 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.
LOOKING AHEAD TO SEPTEMBER 2023...THE AVERAGE HIGH TEMPERATURE ON
THE FIRST OF THE MONTH IS 67 DEGREES...AND THE AVERAGE LOW
TEMPERATURE IS 33 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH
IS 53 DEGREES AND THE AVERAGE LOW TEMPERATURE IS 27 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 1.57 INCHES.
$$