CDUS45 KRIW 200730 CLIP60 CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 130 AM MDT MON APR 20 2026 ................................... ...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR APRIL 19 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 52 5:18 PM 56 2010 42 10 45 MINIMUM 15 5:58 AM 1 2024 18 -3 3 AVERAGE 34 30 4 24 PRECIPITATION (IN) YESTERDAY 0.00 0.26 2022 0.07 -0.07 0.00 MONTH TO DATE 1.61 1.51 0.10 1.01 SINCE MAR 1 2.72 3.41 -0.69 1.50 SINCE JAN 1 6.07 6.91 -0.84 5.20 DEGREE DAYS HEATING YESTERDAY 31 36 -5 41 MONTH TO DATE 620 719 -99 712 SINCE MAR 1 1679 2077 -398 856 SINCE JUL 1 8649 10281 -1632 7776 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 7 HIGHEST WIND DIRECTION S (200) HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (210) AVERAGE WIND SPEED 1.7 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 96 4:00 AM LOWEST 21 4:00 PM AVERAGE 59 .......................................................... THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 42 57 2010 2016 MINIMUM TEMPERATURE (F) 18 -1 2023 SUNRISE AND SUNSET APRIL 20 2026.........SUNRISE 6:29 AM MDT SUNSET 8:13 PM MDT APRIL 21 2026.........SUNRISE 6:27 AM MDT SUNSET 8:14 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT.$$