Climatological Report (Daily)
Issued by NWS

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980
CDUS45 KRIW 170730
CLIP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT MON AUG 17 2026

...................................

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 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         70   3:17 PM  82    2013  71     -1       72
  MINIMUM         39   6:10 AM  28    2009  37      2       42
  AVERAGE         55                        54      1       57

PRECIPITATION (IN)
  YESTERDAY        0.00          0.12 2004   0.04  -0.04     0.02
  MONTH TO DATE    1.75                      0.68   1.07     0.07
  SINCE JUN 1      4.71                      4.57   0.14     1.46
  SINCE JAN 1     12.95                     14.60  -1.65    10.69

DEGREE DAYS
 HEATING
  YESTERDAY       10                        11     -1        8
  MONTH TO DATE  129                       152    -23      146
  SINCE JUN 1    759                       986   -227      819
  SINCE JUL 1    245                       448   -203      377

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE JUN 1      2                         0      2        1
  SINCE JAN 1      2                         0      2        1
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION     W (290)
  AVERAGE WIND SPEED     2.2


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   100          12:00 AM
 LOWEST     25           3:00 PM
 AVERAGE    63

..........................................................


THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   71        85      2020
 MINIMUM TEMPERATURE (F)   37        28      2009


SUNRISE AND SUNSET
AUGUST 17 2026........SUNRISE   6:27 AM MDT   SUNSET   8:24 PM MDT
AUGUST 18 2026........SUNRISE   6:28 AM MDT   SUNSET   8:22 PM MDT


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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