135
CDUS45 KRIW 180736
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
136 AM MDT SUN MAY 18 2025
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 17 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 48 2:13 PM 69 2007 51 -3 55
MINIMUM 32 4:12 AM 18 1999 27 5 31
AVERAGE 40 39 1 43
PRECIPITATION (IN)
YESTERDAY 0.12 0.50 2017 0.07 0.05 0.00
MONTH TO DATE 0.84 1.15 -0.31 1.08
SINCE MAR 1 3.92 5.33 -1.41 6.41
SINCE JAN 1 7.62 8.83 -1.21 10.88
DEGREE DAYS
HEATING
YESTERDAY 25 26 -1 22
MONTH TO DATE 416 488 -72 435
SINCE MAR 1 1611 2934 -1323 2587
SINCE JUL 1 8531 11138 -2607 10061
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE MAR 1 0 0 0 0
SINCE JAN 1 0 0 0 0
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 0.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 4:00 AM
LOWEST 52 1:00 PM
AVERAGE 76
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 51 69 2007
2009
MINIMUM TEMPERATURE (F) 27 20 2003
2011
SUNRISE AND SUNSET
MAY 18 2025...........SUNRISE 5:50 AM MDT SUNSET 8:46 PM MDT
MAY 19 2025...........SUNRISE 5:49 AM MDT SUNSET 8:48 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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