Normal

12.52 in  

Maximum  -  1982

20.48 in  

Minimum   -  1988

6.56 in  

Casper, Wyoming 1961-1990

Mean Annual

45.4 °F  

Daily Maximum  -  07/12/1954

104 °F  

Daily Minimum   -  12/21/1990

-41°F  

Casper, Wyoming 1948-1996

Growing Season

130 days  

Elevation of irrigable area

5,600 ft  

Drainage area above Seminoe Dam

10,812 mi²  

Annual discharge:

Maximum  -  1984

1,890,332 acre-ft 

Minimum   -  1995

479,044 acre-ft 

Average    -  1904-1996

928,237 acre-ft