741
CXUS55 KRIW 021625
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1013 AM MDT FRI MAY 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF APRIL 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2025 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 WETTER THAN NORMAL IN APRIL
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN APRIL WAS 29.8 DEGREES
WHICH IS 1.1 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH
WAS 58 DEGREES ON THE 11TH AND BROKE THE 2003 RECORD OF 55. THE 15TH
HIGH OF 54 DEGREES BROKE 49 FROM 2007. THE 16TH HIGH OF 53 BROKE THE
2010 RECORD OF 52 DEGREES. THE COLDEST READING OF THE MONTH WAS 6
DEGREES BELOW ZERO ON THE 5TH.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 2.59 INCHES...WHICH WAS
114 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 24TH WHEN 0.52 INCHES OF PRECIPITATION FELL. NO
PRECIPITATION RECORDS WERE BROKEN THIS MONTH. THE HIGHEST WIND GUST
WAS 47 MPH FROM THE SOUTHWEST ON THE 12TH.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF APRIL
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 65 04/29/2007
LOW -18 04/13/2022
HIGHEST 58 04/11
LOWEST -6 04/05
AVG. MAXIMUM 43.0 40.9 2.1
AVG. MINIMUM 16.6 16.6 -0.0
MEAN 29.8 28.7 1.1
DAYS MAX >= 90 0
DAYS MAX <= 32 5
DAYS MIN <= 32 30
DAYS MIN <= 0 1
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.59 2011
MINIMUM 0.76 2008
TOTALS 2.59 2.28 0.31 1.02
DAILY AVG. 0.09 0.08 0.01
DAYS >= .01 14
DAYS >= .10 8
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.52 04/24 TO 04/24
STORM TOTAL 0.52
DEGREE DAYS
HEATING TOTAL 1051 1088 -37
SINCE 7/1 8115 10651 -2536
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 2.3
RESULTANT WIND SPEED/DIRECTION 1/160
HIGHEST WIND SPEED/DIRECTION 22/260 DATE 04/12
22/270 04/16
HIGHEST GUST SPEED/DIRECTION 47/230 DATE 04/12
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.00
NUMBER OF DAYS FAIR 2
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) MM
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 9 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 14 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 MAY 2025. THE AVERAGE HIGH TEMPERATURE ON THE FIRST
OF THE MONTH IS 46 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 21
DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 55 DEGREES AND
THE AVERAGE LOW TEMPERATURE IS 30 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 2.35 INCHES.
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