Climatological Report (Daily)
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CDUS45 KRIW 200734
CLIRKS

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
134 AM MDT SUN SEP 20 2026

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

...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR SEPTEMBER 19 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1948 TO 2026


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         65        MM  86    2010  69     -4       75
  MINIMUM         43        MM  21    1965  43      0       44
  AVERAGE         54                        56     -2

PRECIPITATION (IN)
  YESTERDAY        0.12          0.87 1950   0.03   0.09     0.00
  MONTH TO DATE    0.29                      0.46  -0.17     0.13
  SINCE SEP 1      0.29                      0.46  -0.17     0.13
  SINCE JAN 1      3.34                      5.70  -2.36     3.07

DEGREE DAYS
 HEATING
  YESTERDAY       11                         9      2        5
  MONTH TO DATE   42                       114    -72       79
  SINCE SEP 1     42                       114    -72       79
  SINCE JUL 1     56                       173   -117       97

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE   21                         8     13       19
  SINCE SEP 1     21                         8     13       19
  SINCE JAN 1    558                       317    241      441
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    29   HIGHEST WIND DIRECTION     S (160)
  HIGHEST GUST SPEED    38   HIGHEST GUST DIRECTION     S (160)
  AVERAGE WIND SPEED     8.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  THUNDERSTORM
  RAIN
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96           7:00 AM
 LOWEST     45           1:00 PM
 AVERAGE    71

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


THE ROCK SPRINGS WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   69        81      1966
 MINIMUM TEMPERATURE (F)   42        19      1965


SUNRISE AND SUNSET
SEPTEMBER 20 2026.....SUNRISE   7:02 AM MDT   SUNSET   7:17 PM MDT
SEPTEMBER 21 2026.....SUNRISE   7:03 AM MDT   SUNSET   7:15 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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