052
CDUS45 KRIW 200045
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SAT SEP 19 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR SEPTEMBER 19 2026
VALID TODAY AS OF 0600 PM LOCAL TIME.
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)
TODAY
MAXIMUM 75 3:44 PM 92 2010 74 1 76
MINIMUM 49 4:31 AM 23 1965 41 8 41
AVERAGE 62 58 4 59
PRECIPITATION (IN)
TODAY 0.00 0.47 1948 0.03 -0.03 0.00
MONTH TO DATE 0.37 0.51 -0.14 2.11
SINCE SEP 1 0.37 0.51 -0.14 2.11
SINCE JAN 1 6.71 9.34 -2.63 9.42
SNOWFALL (IN)
TODAY MM 0.0 MM 0.0
MONTH TO DATE 0.0 0.5 -0.5 0.0
SINCE SEP 1 0.0 0.5 -0.5 0.0
SINCE JUL 1 0.0 0.5 -0.5 0.0
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 3 8 -5 6
MONTH TO DATE 36 97 -61 70
SINCE SEP 1 36 97 -61 70
SINCE JUL 1 41 142 -101 80
COOLING
TODAY 0 1 -1 0
MONTH TO DATE 43 29 14 15
SINCE SEP 1 43 29 14 15
SINCE JAN 1 636 441 195 465
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 9.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92
LOWEST 27
AVERAGE 60
......................................................
THE CASPER WY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 1956
MINIMUM TEMPERATURE (F) 41 16 1983
SUNRISE AND SUNSET
SEPTEMBER 19 2026.....SUNRISE 6:50 AM MDT SUNSET 7:08 PM MDT
SEPTEMBER 20 2026.....SUNRISE 6:51 AM MDT SUNSET 7:06 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