National Weather Service United States Department of Commerce

2018 Climate Summaries

Click Here for the complete 2018 summary for Wyoming, climate divisions, and precipitation summaries for other cities.

...2018 Highlights for Wyoming...

  • Annual: 23rd warmest year (above normal) on 124 years of record (1895-2018), 63rd wettest year on record with 101 percent of normal  or near normal precipitation.
  • Monthly Temperatures: 8th warmest January and 7th warmest May on record.  6 months had above or much above normal monthly average temperatures, 4 months  were near normal, February and October were below normal.    
  • Monthly Precipitation: 6th driest September on record.  4 months had above or much above normal statewide average precipitation, 2 months had below or much below normal statewide average precipitation, 6 months had near normal monthly average precipitation.
  • Climate Divisions: Climate Division 2 - Snake River Basin, Climate Division 3 - Green and Bear River Basins and Climate Division 9 - Wind River Basin recorded their driest September on 124 years of record.

 

Casper Climate Summary Banner

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...Highlights of 2018...

  • Annual: 41st warmest year (near normal) on 79 years of record (1939-2018), 26th wettest year on record with 104 percent of normal precipitation, 91 percent of normal annual snowfall.  Highest wind gust was 70 mph on June 5th.
     
  • Monthly Temperatures: 8th coldest February, 9th warmest  May, 10th coldest October on record.
     
  • Monthly Precipitation: No months ranked in the top 10 driest or wettest.
     
  • Monthly Snowfall: 6th snowiest February on record.

Lander Climate Summary Banner

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...Highlights of 2018...

  • Annual - 37th warmest year (above normal) on 127 years of record (1892-2018). 
    59th wettest year on record with 106% of normal precipitation.  
    22nd least snowiest year on record with 57.3 inches (63 percent of normal).  
    The peak wind gust for the year was 68 mph on the peak wind gust which occurred on January 30th and April 16th.

     
  • Seasonal: 4th least snowiest Spring (March, April, May) on record with only 11.2 inches.
  • Monthly Precipitation: 10th driest September on record (0.05" of precipitation).

Riverton Climate Summary Banner

Click Here for the complete 2018 summary for Riverton

...Highlights of 2018...

  • Annual: Near normal average temperature and precipitation, and above average snowfall for 2108.
    • Average annual temperature 43.9 degrees was the 43rd warmest year on 96 years of record (1918-2018).
    • 2018 precipitation total was 8.94 inches which was the 47th wettest year on 101 years of record (1918-2018).
    • 2018 snowfall total was 47.6 inches which was the 18th snowiest year on 93 years of record .
  • Seasonal:  10th wettest first three months of the year (January, February, March) with 1.93 inches of precipitation, and 7th snowiest first three months of the year with 26.1 inches of snowfall.
     
  • Monthly Temperatures: No months ranked in the top 10 warmest or coldest during 2018.
  • Monthly Precipitation: 10th wettest February and 8th driest September on record.
  • Monthly Snowfall: No cold season months (October through April) ranked in the top 10 snowiest or least snowiest months.

Top 5 Events of 2018 (video presentations):

 

Numbers 5 through 2 Number 1: The Roosevelt Fire