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.

$$