027
CXUS55 KRIW 021726
CLMRIW

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1111 AM MDT MON JUN 02 2025

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON FOR THE MONTH OF
MAY 2025...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2025 WILL BE AVAILABLE
IN APPROXIMATELY 60 DAYS FROM THE NATIONAL CENTERS FOR ENVIRONMENTAL
INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-WEB/DATASETS). UNOFFICIAL
ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT
HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...RIVERTON WAS WARMER AND DRIER THAN NORMAL IN MAY....

THE AVERAGE TEMPERATURE FOR RIVERTON IN MAY WAS 54.7 DEGREES WHICH
WAS 1.5 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS
84 DEGREES ON THE 12TH. THE HIGH ON THE 10TH OF 81 TIED THE 2012
RECORD. THE COLDEST READING WAS 31 DEGREES ON THE 2ND.

PRECIPITATION FOR THE MONTH WAS 1.14 INCHES...WHICH IS 97 PERCENT OF
NORMAL. THE WETTEST 24-HOURS WAS THE 5TH-6TH WHEN 0.53 INCHES FELL.
THE 13TH HAD 0.30 INCHES AND BROKE THE 1999 RECORD OF 0.13 INCHES.

SNOWFALL FOR THE MONTH WAS 0.9 INCHES. THE SNOWIEST DAY WAS THE 6TH
WITH 0.9 INCHES AND BROKE THE 2010 RECORD OF 0.5 INCHES. THE HIGHEST
WIND GUST WAS 51 MPH FROM THE SOUTHWEST AND OCCURRED ON THE 11TH.

...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             93   05/29/2003
 LOW              19   05/09/2002
HIGHEST           84   05/12
LOWEST            31   05/02
AVG. MAXIMUM    69.1               66.8     2.3
AVG. MINIMUM    40.3               39.5     0.8
MEAN            54.7               53.2     1.5
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32     4
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.32   2011
 MINIMUM        0.18   2006
TOTALS          1.14               1.92   -0.78     2.29
DAILY AVG.      0.04               0.06   -0.02
DAYS >= .01        8
DAYS >= .10        4
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.53   05/05 TO 05/06
 STORM TOTAL    0.36

SNOWFALL (INCHES)
TOTALS           0.9                 MM      MM
SINCE 7/1       30.7                 MM      MM
SNOWDEPTH AVG.     0
DAYS >= 1.0        0

DEGREE DAYS
HEATING TOTAL    319                375     -56
 SINCE 7/1      7156               7812    -656
COOLING TOTAL      6                  8      -2
 SINCE 1/1         6                  8      -2
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.5
RESULTANT WIND SPEED/DIRECTION   2/000
HIGHEST WIND SPEED/DIRECTION    39/230    DATE  05/11
HIGHEST GUST SPEED/DIRECTION    51/230    DATE  05/11

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.26
NUMBER OF DAYS FAIR           20
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     55

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

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

LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 73 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 45 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 84
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 52. THE AVERAGE MONTHLY
PRECIPITATION IS 0.94 INCHES.

$$