475
CXUS55 KRIW 061418 CCA
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1055 AM MDT FRI MAY 01 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER FOR THE MONTH OF
APRIL 2026...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2026 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 APRIL.
THE AVERAGE TEMPERATURE FOR LANDER IN APRIL WAS 45.2 DEGREES WHICH
WAS 2 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS 81
DEGREES ON THE 21ST. THE COLDEST TEMPERATURE WAS 20 DEGREES ON THE
18TH. NO TEMPERATURE RECORDS WERE BROKEN THIS MONTH.
PRECIPITATION FOR THE MONTH WAS 1.36 INCHES...WHICH IS 66 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 29TH-30TH...WITH 0.49
INCHES OF PRECIPITATION. NO PRECIPITATION OR SNOWFALL RECORDS WERE
BROKEN THIS MONTH.
THE SNOWFALL FOR THE MONTH WAS 9.1 INCHES WHICH IS 55 PERCENT OF
NORMAL. THE SNOWIEST 24-HOUR PERIOD WAS ON THE 26TH-27TH WHEN 4.4
INCHES FELL. THE HIGHEST WIND GUST WAS 63 MPH AND OCCURRED ON THE
22ND AND ON THE 15TH FROM THE SOUTHWEST. THERE WAS ALSO A GUST TO 60
MPH FROM THE SOUTHWEST ON THE 11TH.
..THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2026
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 81 04/21
LOWEST 20 04/18
AVG. MAXIMUM 59.1 56.2 2.9
AVG. MINIMUM 31.3 30.3 1.0
MEAN 45.2 43.2 2.0
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 18
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.19 1900
MINIMUM 0.10 1930
TOTALS 1.36 2.07 -0.71 2.57
DAILY AVG. 0.05 0.07 -0.02
DAYS >= .01 8
DAYS >= .10 4
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.49 04/29 TO 04/30
STORM TOTAL 0.44
SNOWFALL (INCHES)
TOTALS 9.1 16.4 -7.3
SINCE 7/1 25.4 83.0 -57.6
SNOWDEPTH AVG. 0
DAYS >= 1.0 2
DEGREE DAYS
HEATING TOTAL 587 652 -65
SINCE 7/1 5205 7202 -1997
COOLING TOTAL 0 0 0
SINCE 1/1 1 0 1
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 8.1
RESULTANT WIND SPEED/DIRECTION 3/250
HIGHEST WIND SPEED/DIRECTION 45/220 DATE 04/22
HIGHEST GUST SPEED/DIRECTION 63/230 DATE 04/15
63/230 04/22
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.28
NUMBER OF DAYS FAIR 21
NUMBER OF DAYS PC 5
NUMBER OF DAYS CLOUDY 4
AVERAGE RH (PERCENT) 47
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 1 SNOW 2
LIGHT SNOW 6 SLEET 0
FOG 7 FOG W/VIS <= 1/4 MILE 2
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO MAY 2026. 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.
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