Climatological Report (Monthly)
Issued by NWS
Issued by NWS
944
CXUS55 KRIW 021627
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1013 AM MDT FRI MAY 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER FOR THE MONTH OF
APRIL 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 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 WETTER THAN NORMAL IN APRIL....
THE AVERAGE TEMPERATURE FOR LANDER IN APRIL WAS 43.8 DEGREES WHICH
WAS 0.6 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS
80 DEGREES ON THE 11TH. THIS BROKE 79 DEGREES FROM 2012. THIS ALSO
SET A RECORD FOR THE EARLIEST 80-DEGREE DAY FOR THE YEAR. PREVIOUSLY
IT WAS APRIL 17TH SET IN 1994. THE 12TH HIGH OF 76 BROKE THE 1988
RECORD OF 75. THE COLDEST TEMPERATURE WAS 14 DEGREES ON THE 19TH.
PRECIPITATION FOR THE MONTH WAS 2.57 INCHES...WHICH IS 124 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 17TH-18TH WHEN 1.24
INCHES OF PRECIPITATION FELL. THE 17TH HAD 1.09 INCHES AND BROKE
0.66 FROM 1968.
SNOWFALL FOR THE MONTH WAS 16 INCHES. THIS IS 98 PERCENT OF NORMAL.
THE SNOWIEST 24-HOUR PERIOD WAS THE 17TH-18TH WITH 13.5 INCHES. NO
SNOWFALL RECORDS WERE BROKEN. THE HIGHEST WIND GUST WAS 52 MPH AND
OCCURRED ON THE 9TH FROM THE WEST.
...THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 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 83 04/23/2012
LOW -11 04/02/1936
04/22/1892
HIGHEST 80 04/11
LOWEST 14 04/19
AVG. MAXIMUM 56.6 56.2 0.4
AVG. MINIMUM 31.0 30.3 0.7
MEAN 43.8 43.2 0.6
DAYS MAX >= 90 0
DAYS MAX <= 32 1
DAYS MIN <= 32 16
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.19 1900
MINIMUM 0.10 1930
TOTALS 2.57 2.07 0.50 1.20
DAILY AVG. 0.09 0.07 0.02
DAYS >= .01 9
DAYS >= .10 5
DAYS >= .50 1
DAYS >= 1.00 1
GREATEST
24 HR. TOTAL 1.24 04/17 TO 04/18
STORM TOTAL 1.09
SNOWFALL (INCHES)
TOTALS 16.0 16.4 -0.4
SINCE 7/1 75.6 83.0 -7.4
SNOWDEPTH AVG. 1
DAYS >= 1.0 2
DEGREE DAYS
HEATING TOTAL 629 652 -23
SINCE 7/1 6488 7202 -714
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.8
RESULTANT WIND SPEED/DIRECTION 2/270
HIGHEST WIND SPEED/DIRECTION 39/260 DATE 04/09
HIGHEST GUST SPEED/DIRECTION 52/270 DATE 04/09
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.29
NUMBER OF DAYS FAIR 20
NUMBER OF DAYS PC 5
NUMBER OF DAYS CLOUDY 5
AVERAGE RH (PERCENT) 51
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 7 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 1 SNOW 2
LIGHT SNOW 4 SLEET 0
FOG 7 FOG W/VIS <= 1/4 MILE 1
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO MAY 2025. THE AVERAGE HIGH TEMPERATURE ON THE FIRST
OF THE MONTH IS 60 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 34
DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 72
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 44. THE AVERAGE MONTHLY
PRECIPITATION IS 2.68 INCHES. THE AVERAGE SNOWFALL IS 4.5 INCHES.
$$