Climatological Report (Monthly)
Issued by NWS
Issued by NWS
294
CXUS55 KRIW 021725
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1111 AM MDT MON JUN 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER 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
...LANDER WAS WARMER AND DRIER THAN NORMAL IN MAY....
THE AVERAGE TEMPERATURE FOR LANDER IN MAY WAS 54.6 DEGREES WHICH WAS
1.8 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS 83
DEGREES ON THE 30TH. THE COLDEST TEMPERATURE WAS 32 DEGREES ON THE
6TH AND 16TH. NO TEMPERATURE RECORDS WERE BROKEN THIS MONTH.
PRECIPITATION FOR THE MONTH WAS 1.88 INCHES...WHICH IS 70 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 5TH-6TH WHEN 1.23 INCHES
OF PRECIPITATION FELL. NO PRECIPITATION OR SNOWFALL RECORDS WERE
BROKEN THIS MONTH..
SNOWFALL FOR THE MONTH WAS 3.4 INCHES. THIS IS 76 PERCENT OF NORMAL.
THE SNOWIEST 24-HOUR PERIOD WAS THE 5TH-6TH WITH 3.4 INCHES. THE
HIGHEST WIND GUST WAS 62 MPH AND OCCURRED ON THE 12TH FROM THE
SOUTHWEST. THE 11TH HAD A PEAK GUST OF 61 MPH FROM THE SOUTHWEST.
...THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 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 13 05/02/1903
HIGHEST 83 05/30
LOWEST 32 05/02
05/06
05/16
AVG. MAXIMUM 68.2 66.1 2.1
AVG. MINIMUM 41.0 39.4 1.6
MEAN 54.6 52.8 1.8
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 4
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 6.77 2011
MINIMUM 0.06 2020
TOTALS 1.88 2.68 -0.80 1.38
DAILY AVG. 0.06 0.09 -0.03
DAYS >= .01 10
DAYS >= .10 4
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 1.23 05/05 TO 05/06
STORM TOTAL 0.78
SNOWFALL (INCHES)
TOTALS 3.4 4.5 -1.1
SINCE 7/1 79.0 87.5 -8.5
SNOWDEPTH AVG. 0
DAYS >= 1.0 2
DEGREE DAYS
HEATING TOTAL 324 385 -61
SINCE 7/1 6812 7588 -776
COOLING TOTAL 8 5 3
SINCE 1/1 8 5 3
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.5
RESULTANT WIND SPEED/DIRECTION 1/240
HIGHEST WIND SPEED/DIRECTION 43/220 DATE 05/11
HIGHEST GUST SPEED/DIRECTION 62/210 DATE 05/12
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.27
NUMBER OF DAYS FAIR 21
NUMBER OF DAYS PC 6
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 53
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 6 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 1
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 1 SNOW 2
LIGHT SNOW 2 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.
LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 72 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 44 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 1.08 INCHES. THE AVERAGE SNOWFALL IS 0.1 INCHES.
$$