CDUS45 KRIW 180733 CLICPR CLIMATE REPORT NATIONAL WEATHER SERVICE RIVERTON WY 133 AM MDT MON MAY 18 2026 ................................... ...THE CASPER WY CLIMATE SUMMARY FOR MAY 17 2026... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1939 TO 2026 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 56 MM 87 1948 67 -11 71 MINIMUM 37 9:00 PM 28 1942 38 -1 29 1986 1990 AVERAGE 47 52 -5 PRECIPITATION (IN) YESTERDAY 0.11 2.22 2000 0.08 0.03 0.00 MONTH TO DATE 0.46 1.21 -0.75 0.41 SINCE MAR 1 1.90 3.46 -1.56 3.33 SINCE JAN 1 2.44 4.51 -2.07 4.05 SNOWFALL (IN) YESTERDAY 0.0 0.4 1978 0.1 -0.1 0.0 MONTH TO DATE T 2.1 -2.1 0.3 SINCE MAR 1 11.4 22.9 -11.5 16.0 SINCE JUL 1 27.1 71.2 -44.1 26.5 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 18 13 5 15 MONTH TO DATE 215 271 -56 215 SINCE MAR 1 1421 1860 -439 1764 SINCE JUL 1 5598 7222 -1624 6779 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 20 HIGHEST WIND DIRECTION NE (30) HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION NE (30) AVERAGE WIND SPEED 12.9 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. LIGHT RAIN RELATIVE HUMIDITY (PERCENT) HIGHEST 92 9:00 PM LOWEST 39 4:00 PM AVERAGE 66 .......................................................... THE CASPER WY CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 68 88 1992 2009 MINIMUM TEMPERATURE (F) 38 25 1943 SUNRISE AND SUNSET MAY 18 2026...........SUNRISE 5:40 AM MDT SUNSET 8:25 PM MDT MAY 19 2026...........SUNRISE 5:39 AM MDT SUNSET 8:26 PM MDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$