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.

Colorado

Precipitation Rankings, April 2009

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
April 2009
1-Month 		2.36"
(59.94mm)		 1.84"
(46.74mm)		 0.52"
(13.20mm)		 103rd Driest
Driest since:
 2002
26th Wettest
Wettest since:
 1900
Ties: 1980
Mar–Apr 2009
2-Month 		3.49"
(88.65mm)		 3.35"
(85.09mm)		 0.14"
(3.56mm)		 81st Driest
Driest since:
 2002
48th Wettest
Wettest since:
 1906
Feb–Apr 2009
3-Month 		4.27"
(108.46mm)		 4.44"
(112.78mm)		 -0.17"
(-4.32mm)		 64th Driest
Driest since:
 2002
65th Wettest
Wettest since:
 1905
Jan–Apr 2009
4-Month 		5.25"
(133.35mm)		 5.51"
(139.95mm)		 -0.26"
(-6.60mm)		 62nd Driest
Driest since:
 2002
67th Wettest
Wettest since:
 1905
Dec 2008–Apr 2009
5-Month 		7.08"
(179.83mm)		 6.58"
(167.13mm)		 0.50"
(12.70mm)		 87th Driest
Driest since:
 2002
41st Wettest
Wettest since:
 1905
Ties: 1912
Nov 2008–Apr 2009
6-Month 		8.00"
(203.20mm)		 7.65"
(194.31mm)		 0.35"
(8.89mm)		 81st Driest
Driest since:
 1904
47th Wettest
Wettest since:
 1984
Ties: 1915
Oct 2008–Apr 2009
7-Month 		9.27"
(235.46mm)		 8.98"
(228.09mm)		 0.29"
(7.37mm)		 73rd Driest
Driest since:
 2002
55th Wettest
Wettest since:
 1942
Sep 2008–Apr 2009
8-Month 		10.37"
(263.40mm)		 10.41"
(264.41mm)		 -0.04"
(-1.01mm)		 66th Driest
Driest since:
 1902, 2002
62nd Wettest
Wettest since:
 1942
Aug 2008–Apr 2009
9-Month 		13.51"
(343.15mm)		 12.42"
(315.47mm)		 1.09"
(27.68mm)		 88th Driest
Driest since:
 2002
40th Wettest
Wettest since:
 1942
Ties: 2008
Jul 2008–Apr 2009
10-Month 		14.99"
(380.75mm)		 14.52"
(368.81mm)		 0.47"
(11.94mm)		 74th Driest
Driest since:
 1902
54th Wettest
Wettest since:
 1942
Ties: 1903
Jun 2008–Apr 2009
11-Month 		15.97"
(405.64mm)		 16.07"
(408.18mm)		 -0.10"
(-2.54mm)		 65th Driest
Driest since:
 1981
63rd Wettest
Wettest since:
 1942
Ties: 1930
May 2008–Apr 2009
12-Month 		17.52"
(445.01mm)		 18.08"
(459.23mm)		 -0.56"
(-14.22mm)		 54th Driest
Driest since:
 2013
74th Wettest
Wettest since:
 1942
Nov 2007–Apr 2009
18-Month 		25.69"
(652.53mm)		 25.76"
(654.30mm)		 -0.07"
(-1.77mm)		 66th Driest
Driest since:
 2013
61st Wettest
Wettest since:
 1942
Ties: 2018
May 2007–Apr 2009
24-Month 		36.29"
(921.77mm)		 36.16"
(918.46mm)		 0.13"
(3.31mm)		 68th Driest
Driest since:
 1902
59th Wettest
Wettest since:
 1942
May 2006–Apr 2009
36-Month 		56.13"
(1,425.70mm)		 54.22"
(1,377.19mm)		 1.91"
(48.51mm)		 85th Driest
Driest since:
 1955
41st Wettest
Wettest since:
 1985
May 2005–Apr 2009
48-Month 		72.64"
(1,845.06mm)		 72.24"
(1,834.90mm)		 0.40"
(10.16mm)		 69th Driest
Driest since:
 1904
56th Wettest
Wettest since:
 1986
May 2004–Apr 2009
60-Month 		92.04"
(2,337.82mm)		 90.24"
(2,292.10mm)		 1.80"
(45.72mm)		 74th Driest
Driest since:
 1957
50th Wettest
Wettest since:
 1987

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