989
CDUS45 KRIW 210727
CLICPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT FRI AUG 21 2026
...............................
..THE CASPER WY CLIMATE SUMMARY FOR AUGUST 20 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 94 4:01 PM 99 2025 86 8 99
MINIMUM 50 5:08 AM 38 2016 51 -1 58
AVERAGE 72 68 4
PRECIPITATION (IN)
YESTERDAY 0.00 0.15 1982 0.02 -0.02 0.00
MONTH TO DATE 1.88 0.56 1.32 0.23
SINCE JUN 1 2.56 3.09 -0.53 1.90
SINCE JAN 1 6.21 8.60 -2.39 6.82
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2020 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.1 -0.1 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 0
MONTH TO DATE 5 8 -3 4
SINCE JUN 1 97 148 -51 100
SINCE JUL 1 5 22 -17 9
COOLING
YESTERDAY 7 4 3 14
MONTH TO DATE 134 118 16 127
SINCE JUN 1 511 369 142 429
SINCE JAN 1 512 373 139 429
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 7.1
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 77 12:00 AM
LOWEST 12 3:00 PM
AVERAGE 45
......................................................
THE CASPER WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 86 96 2024
MINIMUM TEMPERATURE (F) 50 38 2016
SUNRISE AND SUNSET
AUGUST 21 2026........SUNRISE 6:19 AM MDT SUNSET 7:58 PM MDT
AUGUST 22 2026........SUNRISE 6:20 AM MDT SUNSET 7:57 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