National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
CXUS55 KRIW 020531
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1131 PM MDT THU JUN 01 2023

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

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             78   05/28/2003
 LOW               0   05/07/2010
HIGHEST           66   05/21
LOWEST            22   05/06
                       05/10
AVG. MAXIMUM    55.7               50.6     5.1
AVG. MINIMUM    28.9               26.3     2.6
MEAN            42.3               38.4     3.9
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32    26
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.53   2022
 MINIMUM        0.42   2019
TOTALS          1.20               2.35   -1.15     4.53
DAILY AVG.      0.04               0.08   -0.04
DAYS >= .01       14
DAYS >= .10        5
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.43   05/04 TO 05/05
 STORM TOTAL    0.33

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

DEGREE DAYS
HEATING TOTAL    697                823    -126
 SINCE 7/1     11463              11473     -10
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              1.4
RESULTANT WIND SPEED/DIRECTION   1/090
HIGHEST WIND SPEED/DIRECTION    16/270    DATE  05/07
                                16/280          05/22
HIGHEST GUST SPEED/DIRECTION    31/280    DATE  05/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           31
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       0     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

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

$$