Climatological Report (Monthly)
Issued by NWS
Issued by NWS
831
CXUS55 KRIW 020134
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
608 PM MST SAT FEB 01 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 COLDER AND DRIER THAN NORMAL IN JANUARY...
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JANUARY WAS 8.3 DEGREES
WHICH IS 3.7 DEGREES BELOW NORMAL. IT WAS THE 5TH COLDEST JANUARY
SINCE RECORDS BEGAN IN 1998. THE WARMEST READING OF THE MONTH WAS 35
DEGREES ON THE 16TH. THE COLDEST READING OF THE MONTH WAS 34 DEGREES
BELOW ZERO ON THE 20TH. THIS BROKE THE 2011 RECORD OF 11 BELOW.
OTHER LOW RECORDS WERE BROKEN THIS MONTH.
DATE NEW OLD YEAR
19TH -21 -12 2013
23RD -16 -14 2008
25TH -20 -18 1999
26TH -26 -18 2021
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.54 INCHES...WHICH WAS
86 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 2ND-3RD WHEN 0.42 INCHES OF PRECIPITATION FELL. THE 3RD HAD
0.23 INCHES AND TIED 2001. THE 24TH HAD 0.09 INCHES AND BROKE THE
2019 RECORD OF 0.08. THE HIGHEST WIND GUST WAS 27 MPH FROM THE
SOUTHWEST ON THE 21ST.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JANUARY
2025...
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 42 01/27/2015
01/20/2005
01/16/1974
LOW -42 01/30/2023
HIGHEST 35 01/16
LOWEST -34 01/20
AVG. MAXIMUM 20.9 23.0 -2.1
AVG. MINIMUM -4.3 1.0 -5.3
MEAN 8.3 12.0 -3.7
DAYS MAX >= 90 0
DAYS MAX <= 32 29
DAYS MIN <= 32 31
DAYS MIN <= 0 21
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.72 2008
MINIMUM 0.14 2009
TOTALS 1.54 1.80 -0.26 1.18
DAILY AVG. 0.05 0.06 -0.01
DAYS >= .01 16
DAYS >= .10 7
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.42 01/02 TO 01/03
STORM TOTAL 0.27
DEGREE DAYS
HEATING TOTAL 1749 1643 106
SINCE 7/1 6227 6762 -535
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 1.3
RESULTANT WIND SPEED/DIRECTION 0/040
HIGHEST WIND SPEED/DIRECTION 14/270 DATE 01/16
HIGHEST GUST SPEED/DIRECTION 27/250 DATE 01/21
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) 75
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 2
LIGHT SNOW 15 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 FEBRUARY 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 23 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 0 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 30 DEGREES
AND THE AVERAGE LOW TEMPERATURE IS 3 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 1.70 INCHES.
$$