Climatological Report (Monthly) Issued by NWS
000
CXUS55 KRIW 111904
CLMP60
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1252 PM MDT SUN JUN 11 2023
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF MAY 2023...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2023 WILL BE AVAILABLE
APPROXIMATELY IN 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
...LAKE YELLOWSTONE WAS WARMER AND DRIER THAN NORMAL IN MAY...
AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN MAY WAS 42.3 DEGREES
WHICH WAS 3.9 DEGREES ABOVE NORMAL. IT WAS THE WARMEST MAY ON
RECORD. THE WARMEST READING OF THE MONTH WAS 66 DEGREES ON THE 21ST.
THE HIGH OF 62 DEGREES ON THE 1ST TIED 2007. THE 2ND HIT 64 AND
BROKE THE 2015 RECORD OF 61. THE 3RD HIT 59 DEGREES AND TIED 2004.
THE 22ND HIT 64 DEGREES AND TIED 2001. THE COLDEST READING OF THE
MONTH WAS ON THE 6TH AND 10TH WITH 22 DEGREES.
TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.20 INCHES... WHICH WAS
51 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 4TH-5TH WHEN 0.43 INCHES OF PRECIPITATION FELL. THE 4TH HAD
0.33 INCHES AND BROKE THE 2021 RECORD OF 0.29. THE HIGHEST WIND GUST
WAS 31 MPH FROM THE WEST ON THE 7TH.
...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
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 14 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.
LOOKING AHEAD TO JUNE 2023...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 56 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 31 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 68
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 36 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.38 INCHES.
$$