Climatological Report (Monthly)
Issued by NWS
Issued by NWS
830
CXUS55 KRIW 021711
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1111 AM MDT MON JUN 02 2025
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF MAY 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 78 05/28/2003
LOW 0 05/07/2010
HIGHEST 75 05/31
LOWEST 19 05/02
AVG. MAXIMUM 55.2 50.6 4.6
AVG. MINIMUM 28.2 26.3 1.9
MEAN 41.7 38.4 3.3
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 30
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.53 2022
MINIMUM 0.42 2019
TOTALS 2.45 2.35 0.10 2.40
DAILY AVG. 0.08 0.08 0.00
DAYS >= .01 15
DAYS >= .10 7
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.83 05/18 TO 05/19
STORM TOTAL 0.82
DEGREE DAYS
HEATING TOTAL 717 823 -106
SINCE 7/1 8832 11473 -2641
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
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WIND (MPH)
AVERAGE WIND SPEED 1.9
RESULTANT WIND SPEED/DIRECTION 0/090
HIGHEST WIND SPEED/DIRECTION 14/280 DATE 05/29
14/260 05/27
14/270 05/15
HIGHEST GUST SPEED/DIRECTION 31/240 DATE 05/11
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.00
NUMBER OF DAYS FAIR 18
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 69
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 15 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 5 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.
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