Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Wyoming

Precipitation Rankings, September 2011

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
September 2011
1-Month 		0.54"
(13.72mm)		 1.24"
(31.50mm)		 -0.70"
(-17.78mm)		 21st Driest
Driest since:
 1979
108th Wettest
Wettest since:
 1923
Aug–Sep 2011
2-Month 		1.35"
(34.29mm)		 2.31"
(58.67mm)		 -0.96"
(-24.38mm)		 18th Driest
Driest since:
 2012
111th Wettest
Wettest since:
 1923
Jul–Sep 2011
3-Month 		2.36"
(59.94mm)		 3.59"
(91.19mm)		 -1.23"
(-31.25mm)		 17th Driest
Driest since:
 1964
112th Wettest
Wettest since:
 1923
Jun–Sep 2011
4-Month 		3.95"
(100.33mm)		 5.43"
(137.92mm)		 -1.48"
(-37.59mm)		 24th Driest
Driest since:
 2012
105th Wettest
Wettest since:
 1923
May–Sep 2011
5-Month 		8.54"
(216.92mm)		 7.64"
(194.06mm)		 0.90"
(22.86mm)		 95th Driest
Driest since:
 1919
34th Wettest
Wettest since:
 1915
Apr–Sep 2011
6-Month 		11.03"
(280.16mm)		 9.42"
(239.27mm)		 1.61"
(40.89mm)		 103rd Driest
Driest since:
 2012
26th Wettest
Wettest since:
 1941
Mar–Sep 2011
7-Month 		12.51"
(317.75mm)		 10.67"
(271.02mm)		 1.84"
(46.73mm)		 107th Driest
Driest since:
 2012
22nd Wettest
Wettest since:
 1941
Feb–Sep 2011
8-Month 		13.54"
(343.92mm)		 11.63"
(295.40mm)		 1.91"
(48.52mm)		 106th Driest
Driest since:
 2012
23rd Wettest
Wettest since:
 1945
Jan–Sep 2011
9-Month 		14.55"
(369.57mm)		 12.70"
(322.58mm)		 1.85"
(46.99mm)		 104th Driest
Driest since:
 1919
25th Wettest
Wettest since:
 1915, 1945
Dec 2010–Sep 2011
10-Month 		16.24"
(412.50mm)		 13.71"
(348.23mm)		 2.53"
(64.27mm)		 113th Driest
Driest since:
 1919
15th Wettest
Wettest since:
 1923
Nov 2010–Sep 2011
11-Month 		17.59"
(446.79mm)		 14.74"
(374.40mm)		 2.85"
(72.39mm)		 116th Driest
Driest since:
 1919
12th Wettest
Wettest since:
 1923
Oct 2010–Sep 2011
12-Month 		18.87"
(479.30mm)		 15.94"
(404.88mm)		 2.93"
(74.42mm)		 115th Driest
Driest since:
 1919
13th Wettest
Wettest since:
 1995
Apr 2010–Sep 2011
18-Month 		29.52"
(749.81mm)		 25.35"
(643.89mm)		 4.17"
(105.92mm)		 122nd Driest
Driest since:
 2021
6th Wettest
Wettest since:
 1945
Oct 2009–Sep 2011
24-Month 		34.98"
(888.49mm)		 31.88"
(809.75mm)		 3.10"
(78.74mm)		 103rd Driest
Driest since:
 2002
24th Wettest
Wettest since:
 1998
Oct 2008–Sep 2011
36-Month 		52.15"
(1,324.61mm)		 47.81"
(1,214.37mm)		 4.34"
(110.24mm)		 110th Driest
Driest since:
 2002
16th Wettest
Wettest since:
 1997
Oct 2007–Sep 2011
48-Month 		68.60"
(1,742.44mm)		 63.72"
(1,618.49mm)		 4.88"
(123.95mm)		 104th Driest
Driest since:
 2003
21st Wettest
Wettest since:
 1998
Oct 2006–Sep 2011
60-Month 		83.07"
(2,109.98mm)		 79.56"
(2,020.82mm)		 3.51"
(89.16mm)		 92nd Driest
Driest since:
 2004
32nd Wettest
Wettest since:
 1999

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