023
CXUS55 KRIW 011722
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1108 AM MDT FRI AUG 01 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF JULY 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF JULY 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 JULY
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JULY WAS 57.3 DEGREES
WHICH IS 1.8 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH
WAS 82 DEGREES ON THE 1ST. THE HIGH OF 81 ON THE 8TH BROKE THE
RECORD OF 80 DEGREES FROM 2014 AND 2018. THE COLDEST READING OF THE
MONTH WAS 31 DEGREES ON THE 6TH AND BROKE THE 2024 RECORD OF 33.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 0.74 INCHES...WHICH WAS
46 PERCENT OF NORMAL. IT WAS THE 3RD DRIEST JUNE ON RECORD. THE
WETTEST 24-HOUR PERIOD DURING THE MONTH WAS THE 30TH WHEN 0.25
INCHES OF PRECIPITATION FELL. THIS BROKE THE 2013 RECORD OF 0.23.
THE HIGHEST WIND GUST WAS 44 MPH FROM THE WEST ON THE 15TH.
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JULY
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 86 07/14/2002
07/31/2000
LOW 27 07/12/2008
HIGHEST 82 07/01
LOWEST 31 07/06
AVG. MAXIMUM 75.4 72.2 3.2
AVG. MINIMUM 39.3 38.7 0.6
MEAN 57.3 55.5 1.8
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 1
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 2.42 2007
MINIMUM 0.17 2022
TOTALS 0.74 1.51 -0.77 0.50
DAILY AVG. 0.02 0.05 -0.03
DAYS >= .01 6
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.25 07/30 TO 07/30
STORM TOTAL 0.25
DEGREE DAYS
HEATING TOTAL 231 296 -65
SINCE 7/1 231 294 -63
COOLING TOTAL 1 0 1
SINCE 1/1 1 0 1
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 2.6
RESULTANT WIND SPEED/DIRECTION 0/090
HIGHEST WIND SPEED/DIRECTION 18/290 DATE 07/08
HIGHEST GUST SPEED/DIRECTION 44/270 DATE 07/15
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) 54
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 2 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 5 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 AUGUST 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 74 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 40 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 67
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 34 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 1.34 INCHES.
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