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.

Southwest Climate Region

Precipitation Rankings, April 2015

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
April 2015
1-Month		0.98"
(24.89mm)		1.06"
(26.92mm)		-0.08"
(-2.03mm)		66th Driest
Driest since:
1989
63rd Wettest
Wettest since:
1900
Ties: 1929, 2007
Mar–Apr 2015
2-Month		1.87"
(47.50mm)		2.21"
(56.13mm)		-0.34"
(-8.63mm)		46th Driest
Driest since:
1972
83rd Wettest
Wettest since:
1905
Ties: 1898, 1940
Feb–Apr 2015
3-Month		2.71"
(68.83mm)		3.21"
(81.53mm)		-0.50"
(-12.70mm)		47th Driest
Driest since:
1972
82nd Wettest
Wettest since:
1905
Ties: 1984
Jan–Apr 2015
4-Month		3.94"
(100.08mm)		4.20"
(106.68mm)		-0.26"
(-6.60mm)		61st Driest
Driest since:
1972
68th Wettest
Wettest since:
1905
Dec 2014–Apr 2015
5-Month		5.12"
(130.05mm)		5.21"
(132.33mm)		-0.09"
(-2.28mm)		75th Driest
Driest since:
2002
53rd Wettest
Wettest since:
1905
Ties: 1900
Nov 2014–Apr 2015
6-Month		5.75"
(146.05mm)		6.10"
(154.94mm)		-0.35"
(-8.89mm)		62nd Driest
Driest since:
1904
66th Wettest
Wettest since:
1941
Oct 2014–Apr 2015
7-Month		6.41"
(162.81mm)		7.23"
(183.64mm)		-0.82"
(-20.83mm)		46th Driest
Driest since:
1904
82nd Wettest
Wettest since:
1941
Sep 2014–Apr 2015
8-Month		9.02"
(229.11mm)		8.60"
(218.44mm)		0.42"
(10.67mm)		82nd Driest
Driest since:
2002
46th Wettest
Wettest since:
1941
Ties: 2016
Aug 2014–Apr 2015
9-Month		11.61"
(294.89mm)		10.61"
(269.49mm)		1.00"
(25.40mm)		94th Driest
Driest since:
2021
34th Wettest
Wettest since:
1905
Jul 2014–Apr 2015
10-Month		13.93"
(353.82mm)		12.48"
(316.99mm)		1.45"
(36.83mm)		96th Driest
Driest since:
2021
32nd Wettest
Wettest since:
1905
Jun 2014–Apr 2015
11-Month		14.43"
(366.52mm)		13.41"
(340.61mm)		1.02"
(25.91mm)		89th Driest
Driest since:
2021
39th Wettest
Wettest since:
1905
May 2014–Apr 2015
12-Month		15.48"
(393.19mm)		14.53"
(369.06mm)		0.95"
(24.13mm)		87th Driest
Driest since:
2021
41st Wettest
Wettest since:
1942
Nov 2013–Apr 2015
18-Month		19.90"
(505.46mm)		20.64"
(524.26mm)		-0.74"
(-18.80mm)		57th Driest
Driest since:
2021
70th Wettest
Wettest since:
1942
Ties: 1949, 1997
May 2013–Apr 2015
24-Month		29.58"
(751.33mm)		29.05"
(737.87mm)		0.53"
(13.46mm)		80th Driest
Driest since:
2022
47th Wettest
Wettest since:
1942
Ties: 1923
May 2012–Apr 2015
36-Month		40.13"
(1,019.30mm)		43.55"
(1,106.17mm)		-3.42"
(-86.87mm)		31st Driest
Driest since:
1904
95th Wettest
Wettest since:
1907
May 2011–Apr 2015
48-Month		52.28"
(1,327.91mm)		58.02"
(1,473.71mm)		-5.74"
(-145.80mm)		19th Driest
Driest since:
1904
106th Wettest
Wettest since:
1986
May 2010–Apr 2015
60-Month		65.65"
(1,667.51mm)		72.49"
(1,841.25mm)		-6.84"
(-173.74mm)		18th Driest
Driest since:
1957
106th Wettest
Wettest since:
1987

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