Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

West Climate Region

Precipitation Rankings, April 2012

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Wettest/Driest
Since		Record
April 2012
1-Month		1.73"
(43.94mm)		1.33"
(33.78mm)		0.40"
(10.16mm)		100th Driest
Driest since:
1909
30th Wettest
Wettest since:
1935
Mar–Apr 2012
2-Month		4.93"
(125.22mm)		3.67"
(93.22mm)		1.26"
(32.00mm)		104th Driest
Driest since:
2008
26th Wettest
Wettest since:
1983
Feb–Apr 2012
3-Month		5.87"
(149.10mm)		6.39"
(162.31mm)		-0.52"
(-13.21mm)		62nd Driest
Driest since:
1997
68th Wettest
Wettest since:
1983
Jan–Apr 2012
4-Month		8.09"
(205.49mm)		9.37"
(238.00mm)		-1.28"
(-32.51mm)		54th Driest
Driest since:
2022
76th Wettest
Wettest since:
1995
Dec 2011–Apr 2012
5-Month		8.41"
(213.61mm)		11.92"
(302.77mm)		-3.51"
(-89.16mm)		25th Driest
Driest since:
1977
104th Wettest
Wettest since:
1978
Ties: 2018
Nov 2011–Apr 2012
6-Month		9.56"
(242.82mm)		13.79"
(350.27mm)		-4.23"
(-107.45mm)		18th Driest
Driest since:
1977
111th Wettest
Wettest since:
1983
Oct 2011–Apr 2012
7-Month		10.85"
(275.59mm)		14.82"
(376.43mm)		-3.97"
(-100.84mm)		26th Driest
Driest since:
1977
103rd Wettest
Wettest since:
1983
Sep 2011–Apr 2012
8-Month		11.21"
(284.73mm)		15.31"
(388.87mm)		-4.10"
(-104.14mm)		22nd Driest
Driest since:
1977
107th Wettest
Wettest since:
1983
Aug 2011–Apr 2012
9-Month		11.37"
(288.80mm)		15.70"
(398.78mm)		-4.33"
(-109.98mm)		21st Driest
Driest since:
1977
108th Wettest
Wettest since:
1983
Jul 2011–Apr 2012
10-Month		11.71"
(297.43mm)		16.03"
(407.16mm)		-4.32"
(-109.73mm)		20th Driest
Driest since:
2021
109th Wettest
Wettest since:
1983
Jun 2011–Apr 2012
11-Month		12.48"
(316.99mm)		16.52"
(419.61mm)		-4.04"
(-102.62mm)		28th Driest
Driest since:
2021
101st Wettest
Wettest since:
1983
May 2011–Apr 2012
12-Month		13.95"
(354.33mm)		17.44"
(442.98mm)		-3.49"
(-88.65mm)		35th Driest
Driest since:
1977
94th Wettest
Wettest since:
1983
Nov 2010–Apr 2012
18-Month		30.66"
(778.76mm)		31.22"
(792.99mm)		-0.56"
(-14.23mm)		60th Driest
Driest since:
1977
68th Wettest
Wettest since:
1983
May 2010–Apr 2012
24-Month		35.21"
(894.33mm)		34.90"
(886.46mm)		0.31"
(7.87mm)		74th Driest
Driest since:
1977
54th Wettest
Wettest since:
1983
May 2009–Apr 2012
36-Month		53.58"
(1,360.93mm)		52.30"
(1,328.42mm)		1.28"
(32.51mm)		77th Driest
Driest since:
2022
50th Wettest
Wettest since:
1984
May 2008–Apr 2012
48-Month		66.24"
(1,682.50mm)		69.56"
(1,766.82mm)		-3.32"
(-84.32mm)		56th Driest
Driest since:
2015
70th Wettest
Wettest since:
1998
May 2007–Apr 2012
60-Month		79.87"
(2,028.70mm)		86.83"
(2,205.48mm)		-6.96"
(-176.78mm)		40th Driest
Driest since:
1933
85th Wettest
Wettest since:
1999

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