NZUS95 KRIW 021651
LLLRIW
WYZ001>020-022>030-030451-

Public Information Statement
National Weather Service Riverton WY
1051 AM MDT Mon Jun 2 2025

CLM Summaries May 2025

BIG PINEY:

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BIG PINEY 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

...BIG PINEY WAS WARMER AND DRIER THAN NORMAL IN MAY...

THE AVERAGE TEMPERATURE FOR BIG PINEY IN MAY WAS 47.8 DEGREES WHICH WAS 2.5 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS 81 DEGREES ON THE 31ST. THE 10TH TIED THE 1994 RECORD. THE COLDEST TEMPERATURE WAS 19 DEGREES ON THE 16TH. THE LOW ON THE 15TH OF 24 TIED THE 1977 RECORD.

PRECIPITATION FOR THE MONTH WAS 0.66 INCHES…WHICH IS 54 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 17TH-18TH WITH 0.42 INCHES. THE 18TH HAD 0.35 INCHES AND BROKE THE 2018 RECORD OF 0.32 INCHES. THE HIGHEST WIND GUST WAS 54 MPH OCCURRING ON THE 11TH FROM THE WEST.

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LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 34 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 78
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 39 DEGREES. THE AVERAGE MONTHLY PRECIPITATION IS 1.01 INCHES.

BUFFALO:

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BUFFALO FOR THE MONTH OF
MAY 2025…

...BUFFALO WAS WARMER AND WETTER IN MAY...

THE AVERAGE TEMPERATURE FOR BUFFALO IN MAY WAS 53.7 DEGREES WHICH IS 1.7 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS 85 DEGREES ON THE 11TH AND BROKE THE 2017 RECORD OF 75. THE 10TH HIGH OF 82 BROKE 78 DEGREES FROM 2007. THE COLDEST TEMPERATURE WAS 32 DEGREES ON THE 5TH AND 6TH.

PRECIPITATION FOR THE MONTH WAS 2.79 INCHES...WHICH IS 102 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 13TH-14TH WITH 0.69 INCHES. NO PRECIPITATION RECORDS WERE BROKEN THIS MONTH. THE HIGHEST WIND GUST WAS 62 MPH OCCURRING ON THE 19TH FROM THE NORTHWEST.

________________________________________

LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 68 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 46 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 80 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 54. THE AVERAGE MONTHLY
PRECIPITATION IS 2.07 INCHES.

CASPER:

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR CASPER FOR THE MONTH OF
MAY 2025…

…MAY WAS WARMER AND DRIER THAN NORMAL FOR CASPER...

AVERAGE TEMPERATURE FOR CASPER IN MAY WAS 53 DEGREES WHICH IS 1 DEGREE ABOVE NORMAL. THE WARMEST READING OF THE MONTH WAS 84 DEGREES ON THE 12TH. THE COLDEST READING FOR THE MONTH WAS 28 DEGREES ON THE 22ND.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.28 INCHES…WHICH IS 58 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS ON THE 18TH-19TH WITH 0.31 INCHES. NO PRECIPITATION RECORDS WERE BROKEN THIS MONTH.
SNOWFALL FOR THE MONTH WAS 0.3 INCHES…WHICH IS 12 PERCENT OF NORMAL THE SNOWIEST 24-HOUR PERIOD WAS THE 6TH WITH 0.3 INCHES. THERE WERE NO SNOWFALL RECORDS BROKEN THIS MONTH. THE HIGHEST WIND GUST WAS 56 MPH FROM THE SOUTHEAST ON THE 4TH.

________________________________________

LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 74 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 42 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 85
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 49. THE AVERAGE MONTHLY
PRECIPITATION IS 1.34 INCHES. THE AVERAGE SNOWFALL IS 0.1 INCHES.

GREYBULL:

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

...GREYBULL IN MAY WAS WARMER AND WETTER THAN NORMAL....

THE AVERAGE TEMPERATURE FOR GREYBULL IN MAY WAS 58.9 DEGREES
WHICH IS 1.9 DEGREES ABOVE NORMAL. THE WARMEST TEMPERATURE FOR THE MONTH WAS 89 DEGREES ON THE 11TH. THIS BROKE THE 2007 RECORD OF 85. THE 4TH HIGH OF 85 TIED 2004. THE HIGH ON THE 10TH OF 87 BROKE 82 DEGREES FROM 2007. THE COLDEST TEMPERATURE WAS 34 DEGREES ON THE 2ND.

PRECIPITATION FOR THE MONTH WAS 1.58 INCHES...WHICH IS 119 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD OCCURRED ON THE 13TH-14TH WITH 0.83 INCHES. THE 13TH HAD 0.60 INCHES AND BROKE THE 2018 RECORD OF 0.06. THE 11TH HAD 0.40 INCHES AND TIED 2005. THE HIGHEST WIND GUST WAS 61 MPH FROM THE NORTHWEST ON THE 11TH.

________________________________________

LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 76 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 49 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 87 DEGREES… AND THE AVERAGE LOW TEMPERATURE IS 56 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 1.08 INCHES.

LAKE YELLOWSTONE:

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF MAY 2025...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2025 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 WETTER THAN NORMAL IN MAY…

AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN MAY WAS 41.7 DEGREES WHICH IS 3.3 DEGREES ABOVE NORMAL. IT WAS THE 3RD WARMEST MAY SINCE RECORDS BEGAN IN 1998. THE WARMEST READING OF THE MONTH WAS 75 DEGREES ON THE 31ST. THIS BROKE THE 2002 RECORD OF 71 DEGREES. THE 10TH HIGH OF 68 BROKE THE 2007 RECORD OF 63. THE COLDEST READING OF THE MONTH WAS 19 DEGREES ON THE 2ND.

TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 2.45 INCHES...WHICH WAS
104 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS THE 18TH-19TH WHEN 0.83 INCHES OF PRECIPITATION FELL. THE 18TH HAD 0.82 INCHES AND BROKE THE 2013 RECORD OF 0.46. THE HIGHEST WIND GUST WAS 31 MPH FROM THE SOUTHWEST ON THE 11TH.

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LOOKING AHEAD TO JUNE 2025. 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.

LANDER:

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

...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.

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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.

RIVERTON:

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

...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.

________________________________________

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.

ROCK SPRINGS:

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR ROCK SPRINGS FOR THE
MONTH OF MAY 2025...

...ROCK SPRINGS WAS DRIER AND WARMER THAN NORMAL IN MAY...

THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN MAY WAS 53.6 DEGREES WHICH WAS 2.8 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS 83 DEGREES ON THE 31ST. THE 10TH HIGH OF 79 BROKE THE 2004 RECORD OF 76. THE COLDEST TEMPERATURE WAS 30 DEGREES ON THE 6TH AND 16TH.

PRECIPITATION FOR THE MONTH WAS 0.34 INCHES...WHICH WAS 27 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 5TH-6TH WITH 0.11 INCHES. NO PRECIPITATION RECORDS WERE BROKEN THIS MONTH.. THE HIGHEST WIND GUST WAS 60 MPH FROM THE WEST ON THE 13TH

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LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 70 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 43 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 81 DEGREES AND THE AVERAGE LOW TEMPERATURE IS 51. THE AVERAGE MONTHLY
PRECIPITATION IS 0.70 INCHES.

WORLAND:

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR WORLAND MUNICIPAL AIRPORT
FOR THE MONTH OF MAY 2025...

...WORLAND WAS WARMER AND SLIGHTLY DRIER THAN NORMAL IN MAY...

AVERAGE TEMPERATURE FOR WORLAND IN MAY WAS 55.6DEGREES WHICH IS 0.8 DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH WAS 87 DEGREES ON THE 12TH. THE COLDEST READING FOR THE MONTH WAS 29 DEGREES ON THE 2ND. NO TEMPERATURE RECORDS WERE BROKEN THIS MONTH.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.61 INCHES…WHICH IS 97 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS ON THE 5TH-6TH WITH 0.58 INCHES. THE 13TH HAD 0.53 INCHES AND BROKE THE 2020 RECORD OF 0.28 INCHES. THE HIGHEST WIND GUST WAS 49 MPH FROM THE SOUTHWEST ON THE 11TH.

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LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 76 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 45 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 86
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 51 DEGREES. THE AVERAGE MONTHLY PRECIPITATION IS 0.97 INCHES.

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