Cold and Wet May, Wettest Ever in Lander and Worland

May 2011

Lander - Wettest May, Third Wettest Month on Record, and 10th Coldest May  

Worland (airport) - Wettest and Second Coldest May on Record

Downtown Riverton -  Second Wettest  and Second Coldest May

Rock Springs (airport) - Ninth Wettest and Fourth Coldest May

Casper (Airport) - Fourth Coldest May 


 

Lander - Wettest May, Third Wettest Month on Record, and 10th Coldest May

The period of record goes all the way back to 1892.   Note that 2008, 2010 and 2011 are in the top 15 over the last 119 years. 

Top 15 Wettest Mays at Lander
(Period of Record 1892-2011)
Rank Precipitation (inches) Year
1 6.79 2011
2 6.13 2008
3 6.06 1924
4 6.03 1957
5 6.02 1898
6 5.92 1935
7 5.70 1930
8 5.56 1921
9 5.47 1995
10 5.30 1989
11 5.26 1917
12 5.22 1958
13 5.16 1978
14 4.95 1971
15 4.70 2010
 
Top Five Wettest Months  at Lander
Rank Precipitation Month Year
1 7.19 April 1900
2 6.88 June 1947
3 6.79 May
2011
4 6.44 April 1999
5 6.13 May 2008
 
Top 10 Coldest Mays at Lander
Rank Average Temperature (F) Year
1 45.8 1950
2 45.9 1917
3 46.3 1907,1935
5 46.7 1892
6 46.8 2010
7 46.9 1909
8 47.3 1953
9 47.7 1916
10 47.8 2011

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Worland (Airport) - Wettest and Second Coldest May on Record

Top Ten Wettest Mays at Worland (Period of Record 1960-2011)
Rank Precipitation (inches) Year
1 4.53 2011
2 4.10 1978
3 3.79 1975
4 3.34 1993
5 3.10 2008
6 2.70 1981
7 2.62 2005
8 2.61 1988
9 2.59 1992
10 2.55 1962
 
Top Seven Coldest Mays at Worland
Rank Average Temperature (F) Year
1 50.0 2010
2 50.2 2011
3 52.4 1983,1975
5 52.5 1968
6 53.2 2008, 1995

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Downtown Riverton -  Second Wettest  and Second Coldest May

 

Top 10 Wettest Mays at Riverton
(Period of Record 1907-2011)

Rank Precipitation (inches) Year
1 6.22 1921
2 5.29 2011
3 4.75 2008
4 4.59 1924
5 4.44 1978
6 4.42 1971
7 4.19 1957
8 3.98 1942
9 3.94 1935
10 3.91 2010
 
Top Five Coldest Mays at Riverton
Rank Average Temperature (F) Year
1 47.3 1950
2 48.3 2011, 1935
4 48.5 2010
5 48.7 1983

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Rock Springs (Airport) - Ninth Wettest and Fourth Coldest May


 

Top 10 Wettest Mays at Rock Springs
Period of Record 1948-2011
Rank Precipitation (inches) Year
1 3.67 1995
2 3.56 1971
3 3.54 1981
4 3.30 1957
5 2.92 1980
6 2.81 1991
7 2.49 1999
8 2.48 1978
9 2.44 2011
10 2.22 1987
 
Top FIve Coldest Mays at Rock Springs
Rank Average Temperatures (F) Year
1 44.7 2010
2 44.9 1953
3 45.2 1950
4 45.8 2011
5 46.0

1965

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Casper (Airport) - Fourth Coldest May

Top 10 Coldest Mays on Record at Casper
Period of Record 1939-2011
Rank Average Temperature (F) Year
1 46.2 1950
2 46.5 2010
3 47.2 1946
4 47.6 2011
5 48.0 1968
6 48.2 1943
7 48.3 1995
8 48.4 1983
8 48.6 1953
10 48.8 1975

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