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 2015

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Wettest/Driest
Since		Record
April 2015
1-Month		0.91"
(23.11mm)		1.33"
(33.78mm)		-0.42"
(-10.67mm)		46th Driest
Driest since:
1909
84th Wettest
Wettest since:
1935
Mar–Apr 2015
2-Month		1.53"
(38.86mm)		3.67"
(93.22mm)		-2.14"
(-54.36mm)		8th Driest
Driest since:
2008
122nd Wettest
Wettest since:
1983
Feb–Apr 2015
3-Month		3.45"
(87.63mm)		6.39"
(162.31mm)		-2.94"
(-74.68mm)		14th Driest
Driest since:
1997
116th Wettest
Wettest since:
1983
Jan–Apr 2015
4-Month		4.04"
(102.62mm)		9.37"
(238.00mm)		-5.33"
(-135.38mm)		4th Driest
Driest since:
2022
126th Wettest
Wettest since:
1995
Dec 2014–Apr 2015
5-Month		8.29"
(210.57mm)		11.92"
(302.77mm)		-3.63"
(-92.20mm)		21st Driest
Driest since:
1977
108th Wettest
Wettest since:
1978
Nov 2014–Apr 2015
6-Month		9.67"
(245.62mm)		13.79"
(350.27mm)		-4.12"
(-104.65mm)		20th Driest
Driest since:
1977
109th Wettest
Wettest since:
1983
Oct 2014–Apr 2015
7-Month		10.34"
(262.64mm)		14.82"
(376.43mm)		-4.48"
(-113.79mm)		18th Driest
Driest since:
1977
111th Wettest
Wettest since:
1983
Sep 2014–Apr 2015
8-Month		11.25"
(285.75mm)		15.31"
(388.87mm)		-4.06"
(-103.12mm)		24th Driest
Driest since:
1977
105th Wettest
Wettest since:
1983
Aug 2014–Apr 2015
9-Month		12.13"
(308.10mm)		15.70"
(398.78mm)		-3.57"
(-90.68mm)		35th Driest
Driest since:
1977
94th Wettest
Wettest since:
1983
Jul 2014–Apr 2015
10-Month		12.58"
(319.53mm)		16.03"
(407.16mm)		-3.45"
(-87.63mm)		37th Driest
Driest since:
2021
92nd Wettest
Wettest since:
1983
Jun 2014–Apr 2015
11-Month		12.66"
(321.56mm)		16.52"
(419.61mm)		-3.86"
(-98.05mm)		32nd Driest
Driest since:
2021
97th Wettest
Wettest since:
1983
May 2014–Apr 2015
12-Month		13.20"
(335.28mm)		17.44"
(442.98mm)		-4.24"
(-107.70mm)		24th Driest
Driest since:
1977
105th Wettest
Wettest since:
1983
Nov 2013–Apr 2015
18-Month		21.24"
(539.50mm)		31.22"
(792.99mm)		-9.98"
(-253.49mm)		5th Driest
Driest since:
1977
123rd Wettest
Wettest since:
1983
May 2013–Apr 2015
24-Month		24.50"
(622.30mm)		34.90"
(886.46mm)		-10.40"
(-264.16mm)		6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1983
May 2012–Apr 2015
36-Month		36.93"
(938.02mm)		52.30"
(1,328.42mm)		-15.37"
(-390.40mm)		3rd Driest
Driest since:
2022
124th Wettest
Wettest since:
1984
May 2011–Apr 2015
48-Month		50.88"
(1,292.35mm)		69.56"
(1,766.82mm)		-18.68"
(-474.47mm)		1st Driest
Driest to Date
2015
125th Wettest
Wettest since:
1998
May 2010–Apr 2015
60-Month		72.14"
(1,832.36mm)		86.83"
(2,205.48mm)		-14.69"
(-373.12mm)		9th Driest
Driest since:
1933
116th Wettest
Wettest since:
1999

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