Climatological Report (Daily)
Issued by NWS
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CDUS45 KRIW 180730
CLIRKS
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT THU SEP 18 2025
...................................
...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR SEPTEMBER 17 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1948 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 66 2:53 PM 83 2010 70 -4 62
MINIMUM 40 5:10 AM 10 1965 44 -4 40
AVERAGE 53 57 -4
PRECIPITATION (IN)
YESTERDAY 0.00 1.29 1965 0.02 -0.02 0.11
MONTH TO DATE 0.13 0.40 -0.27 0.39
SINCE SEP 1 0.13 0.40 -0.27 0.39
SINCE JAN 1 3.07 5.64 -2.57 4.62
DEGREE DAYS
HEATING
YESTERDAY 12 8 4 14
MONTH TO DATE 65 96 -31 57
SINCE SEP 1 65 96 -31 57
SINCE JUL 1 83 155 -72 88
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 19 8 11 32
SINCE SEP 1 19 8 11 32
SINCE JAN 1 441 317 124 439
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 8.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 89 6:00 AM
LOWEST 30 3:00 PM
AVERAGE 60
..........................................................
THE ROCK SPRINGS WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 84 2014
MINIMUM TEMPERATURE (F) 43 5 1965
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 7:00 AM MDT SUNSET 7:20 PM MDT
SEPTEMBER 19 2025.....SUNRISE 7:01 AM MDT SUNSET 7:18 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$