855
CXUS55 KRIW 011705
CLMRKS

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1105 AM MDT THU OCT 01 2026

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

...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...

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

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             93   09/04/2022
 LOW               5   09/18/1965
HIGHEST           85   09/13
LOWEST            36   09/20
AVG. MAXIMUM    74.4               70.7     3.7
AVG. MINIMUM    47.6               43.9     3.7
MEAN            61.0               57.3     3.7
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.67   1965
 MINIMUM           T   2018
TOTALS          0.31               0.79   -0.48     0.54
DAILY AVG.      0.01               0.03   -0.02
DAYS >= .01        8
DAYS >= .10        1
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.19   09/18 TO 09/19
 STORM TOTAL    0.12

SNOWFALL (INCHES)
TOTALS            MM                1.2      MM
SINCE 7/1         MM                1.2      MM
SNOWDEPTH AVG.    MM
DAYS >= 1.0       MM

DEGREE DAYS
HEATING TOTAL    133                242    -109
 SINCE 7/1       147                301    -154
COOLING TOTAL     21                 11      10
 SINCE 1/1       558                320     238
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              9.7
RESULTANT WIND SPEED/DIRECTION   5/230
HIGHEST WIND SPEED/DIRECTION    47/160    DATE  09/17
HIGHEST GUST SPEED/DIRECTION    62/170    DATE  09/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.19
NUMBER OF DAYS FAIR           24
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     45

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       4     FOG W/VIS <= 1/4 MILE      1
HAZE                      2

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

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