CDUS45 KRIW 160821 CLIP60 CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 221 AM MDT THU APR 16 2026 ................................... ...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR APRIL 15 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 38 10:52 AM 54 2025 40 -2 54 MINIMUM 27 12:15 AM -5 1999 16 11 15 2001 AVERAGE 33 28 5 35 PRECIPITATION (IN) YESTERDAY 0.43 0.56 2002 0.08 0.35 0.00 MONTH TO DATE 1.18 1.20 -0.02 0.71 SINCE MAR 1 2.29 3.10 -0.81 1.20 SINCE JAN 1 5.64 6.60 -0.96 4.90 DEGREE DAYS HEATING YESTERDAY 32 37 -5 30 MONTH TO DATE 454 575 -121 559 SINCE MAR 1 1513 1933 -420 703 SINCE JUL 1 8483 10137 -1654 7623 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 12 HIGHEST WIND DIRECTION W (260) HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION W (260) AVERAGE WIND SPEED 3.3 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 9:00 PM LOWEST 63 3:00 AM AVERAGE 82 .......................................................... THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 41 53 2025 MINIMUM TEMPERATURE (F) 17 -2 1999 SUNRISE AND SUNSET APRIL 16 2026.........SUNRISE 6:36 AM MDT SUNSET 8:08 PM MDT APRIL 17 2026.........SUNRISE 6:34 AM MDT SUNSET 8:09 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$