Climatological Report (Monthly)
Issued by NWS
Issued by NWS
504
CXUS55 KRIW 021808
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1014 AM MST THU JAN 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF DECEMBER 2024...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2024 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 AND DRIER THAN NORMAL IN DECEMBER...
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN DECEMBER WAS 20.6
DEGREES WHICH IS 7.6 DEGREES ABOVE NORMAL. IT WAS THE WARMEST
DECEMBER SINCE RECORDS BEGAN IN 1998. THE PREVIOUS RECORD WAS 18.2
DEGREES SET IN 2023. THE WARMEST READING OF THE MONTH WAS 38 DEGREES
ON THE 2ND. THE 7TH HIGH OF 37 TIED 2006. THE 20TH HIGH OF 37 BROKE
THE 2023 RECORD OF 34 DEGREES. THE 21ST HIGH OF 37 TIED 2023 AND
2019. THE 24TH HIGH OF 34 DEGREES BROKE THE 2005 RECORD OF 32. THE
COLDEST READING OF THE MONTH WAS 1 DEGREE ON THE 1ST.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.33 INCHES...WHICH WAS
57 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 29TH WHEN 0.42 INCHES OF PRECIPITATION FELL. NO
PRECIPITATION RECORDS WERE BROKEN THIS MONTH. THE HIGHEST WIND GUST
WAS 32 MPH FROM THE SOUTHWEST ON THE 18TH.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
2024...
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 46 12/12/2014
LOW -36 12/22/2022
HIGHEST 38 12/02
LOWEST 1 12/01
AVG. MAXIMUM 29.5 23.3 6.2
AVG. MINIMUM 11.7 2.7 9.0
MEAN 20.6 13.0 7.6
DAYS MAX >= 90 0
DAYS MAX <= 32 20
DAYS MIN <= 32 31
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.15 2007
MINIMUM 0.37 2000
TOTALS 1.33 2.35 -1.02 1.17
DAILY AVG. 0.04 0.08 -0.04
DAYS >= .01 16
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.42 12/29 TO 12/29
STORM TOTAL 0.42
DEGREE DAYS
HEATING TOTAL 1371 1612 -241
SINCE 7/1 4478 5119 -641
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 2.5
RESULTANT WIND SPEED/DIRECTION 0/260
HIGHEST WIND SPEED/DIRECTION 16/280 DATE 12/08
16/270 12/15
HIGHEST GUST SPEED/DIRECTION 32/250 DATE 12/18
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) 78
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 0 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 1
LIGHT SNOW 16 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 JANUARY 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 23 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 1 DEGREE. THE AVERAGE HIGH BY THE END OF THE MONTH IS 23 DEGREES
AND THE AVERAGE LOW TEMPERATURE IS 0 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 1.80 INCHES.
$$