Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS45 KRIW 170731
CLIP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
131 AM MDT THU SEP 17 2026
...................................
...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 16 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 68 3:23 PM 77 2000 61 7 54
MINIMUM 29 5:34 AM 27 2007 30 -1 30
2016
2017
AVERAGE 49 45 4 42
PRECIPITATION (IN)
YESTERDAY 0.00 0.38 2022 0.05 -0.05 0.03
MONTH TO DATE 0.35 0.80 -0.45 1.19
SINCE SEP 1 0.35 0.80 -0.45 1.19
SINCE JAN 1 14.27 16.06 -1.79 12.90
DEGREE DAYS
HEATING
YESTERDAY 16 20 -4 23
MONTH TO DATE 261 276 -15 234
SINCE SEP 1 261 276 -15 234
SINCE JUL 1 629 918 -289 750
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JAN 1 2 0 2 1
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 1.3
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 92 5:00 AM
LOWEST 30 5:00 PM
AVERAGE 61
..........................................................
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 60 73 2009
2020
MINIMUM TEMPERATURE (F) 30 24 2003
2017
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 7:03 AM MDT SUNSET 7:28 PM MDT
SEPTEMBER 18 2026.....SUNRISE 7:04 AM MDT SUNSET 7:26 PM MDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$