Climatological Report (Monthly)
Issued by NWS
Issued by NWS
434
CXUS55 KRIW 011659
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1041 AM MDT TUE JUL 01 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF JUNE 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF JUNE 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 DRIER THAN NORMAL IN JUNE...
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JUNE WAS 50.1 DEGREES
WHICH IS 3.1 DEGREES ABOVE NORMAL. IT WAS THE 7TH WARMEST JUNE SINCE
RECORDS BEGAN IN 1998. THE WARMEST READING OF THE MONTH WAS 78
DEGREES ON THE 19TH AND BROKE THE 2021 RECORD OF 74. THE HIGH OF 75
ON THE 1ST BROKE THE 2020 RECORD OF 71. THE COLDEST READING OF THE
MONTH WAS 26 DEGREES ON THE 5TH AND ON THE 24TH WHICH BROKE THE 2017
RECORD OF 28. THE 6TH AND 23RD BOTH HAD A LOW OF 27 DEGREES AND TIED
THE 2003 RECORDS.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 0.65 INCHES...WHICH WAS
27 PERCENT OF NORMAL. IT WAS THE 3RD DRIEST JUNE ON RECORD. THE
WETTEST 24-HOUR PERIOD DURING THE MONTH WAS THE 22ND WHEN 0.34
INCHES OF PRECIPITATION FELL. THERE WERE NO PRECIPITATION RECORDS
BROKEN. THE HIGHEST WIND GUST WAS 44 MPH FROM THE WEST ON THE 19TH.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JUNE
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 83 06/29/2015
LOW 21 06/04/2011
HIGHEST 78 06/19
LOWEST 26 06/05
06/24
AVG. MAXIMUM 66.3 61.1 5.2
AVG. MINIMUM 33.8 33.0 0.8
MEAN 50.1 47.0 3.1
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 10
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.34 2010
MINIMUM 0.18 2021
TOTALS 0.65 2.38 -1.73 1.24
DAILY AVG. 0.02 0.08 -0.06
DAYS >= .01 7
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.34 06/22 TO 06/22
STORM TOTAL 0.34
DEGREE DAYS
HEATING TOTAL 442 538 -96
SINCE 7/1 9274 12011 -2737
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 2.7
RESULTANT WIND SPEED/DIRECTION 0/060
HIGHEST WIND SPEED/DIRECTION 24/280 DATE 06/19
HIGHEST GUST SPEED/DIRECTION 44/280 DATE 06/19
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.00
NUMBER OF DAYS FAIR 30
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 56
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 7 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 JULY 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 68 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 36 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 74
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 40 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 1.51 INCHES.
$$