821
CDUS45 KRIW 210730
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT TUE APR 21 2026
...............................
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR APRIL 20 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 60R 4:45 PM 57 2010 42 18 43
2016
MINIMUM 23 6:15 AM -1 2023 18 5 25
AVERAGE 42 30 12 34
PRECIPITATION (IN)
YESTERDAY 0.00 0.40 2001 0.08 -0.08 0.07
MONTH TO DATE 1.61 1.59 0.02 1.08
SINCE MAR 1 2.72 3.49 -0.77 1.57
SINCE JAN 1 6.07 6.99 -0.92 5.27
DEGREE DAYS
HEATING
YESTERDAY 23 35 -12 31
MONTH TO DATE 643 754 -111 743
SINCE MAR 1 1702 2112 -410 887
SINCE JUL 1 8672 10316 -1644 7807
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 13 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 2.2
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 92 6:00 AM
LOWEST 12 4:00 PM
AVERAGE 52
......................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 42 56 2009
2016
MINIMUM TEMPERATURE (F) 18 2 2002
SUNRISE AND SUNSET
APRIL 21 2026.........SUNRISE 6:27 AM MDT SUNSET 8:14 PM MDT
APRIL 22 2026.........SUNRISE 6:26 AM MDT SUNSET 8:15 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page