Regional Rankings

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Please note, Palmer Indices are not available for NWS Regions. 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 Driest

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
April 2015 1-Month	0.91" (23.11mm)	1.33" (33.78mm)	-0.42" (-10.67mm)	45th Driest	Driest since: 2014	1909
April 2015 1-Month	0.91" (23.11mm)	1.33" (33.78mm)	-0.42" (-10.67mm)	84th Wettest	Wettest since: 2012	1935
Mar–Apr 2015 2-Month	1.53" (38.86mm)	3.67" (93.22mm)	-2.14" (-54.36mm)	8th Driest	Driest since: 2008	2008
Mar–Apr 2015 2-Month	1.53" (38.86mm)	3.67" (93.22mm)	-2.14" (-54.36mm)	121st Wettest	Wettest since: 2014	1983
Feb–Apr 2015 3-Month	3.45" (87.63mm)	6.39" (162.31mm)	-2.94" (-74.68mm)	14th Driest	Driest since: 2013	1997
Feb–Apr 2015 3-Month	3.45" (87.63mm)	6.39" (162.31mm)	-2.94" (-74.68mm)	115th Wettest	Wettest since: 2014	1983
Jan–Apr 2015 4-Month	4.04" (102.62mm)	9.37" (238.00mm)	-5.33" (-135.38mm)	4th Driest	Driest since: 2013	2022
Jan–Apr 2015 4-Month	4.04" (102.62mm)	9.37" (238.00mm)	-5.33" (-135.38mm)	125th Wettest	Wettest since: 2014	1995
Dec 2014–Apr 2015 5-Month	8.29" (210.57mm)	11.92" (302.77mm)	-3.63" (-92.20mm)	21st Driest	Driest since: 2014	1977
Dec 2014–Apr 2015 5-Month	8.29" (210.57mm)	11.92" (302.77mm)	-3.63" (-92.20mm)	107th Wettest	Wettest since: 2012	1978
Nov 2014–Apr 2015 6-Month	9.67" (245.62mm)	13.79" (350.27mm)	-4.12" (-104.65mm)	20th Driest	Driest since: 2014	1977
Nov 2014–Apr 2015 6-Month	9.67" (245.62mm)	13.79" (350.27mm)	-4.12" (-104.65mm)	108th Wettest	Wettest since: 2013	1983
Oct 2014–Apr 2015 7-Month	10.34" (262.64mm)	14.82" (376.43mm)	-4.48" (-113.79mm)	18th Driest	Driest since: 2014	1977
Oct 2014–Apr 2015 7-Month	10.34" (262.64mm)	14.82" (376.43mm)	-4.48" (-113.79mm)	110th Wettest	Wettest since: 2013	1983
Sep 2014–Apr 2015 8-Month	11.25" (285.75mm)	15.31" (388.87mm)	-4.06" (-103.12mm)	24th Driest	Driest since: 2014	1977
Sep 2014–Apr 2015 8-Month	11.25" (285.75mm)	15.31" (388.87mm)	-4.06" (-103.12mm)	104th Wettest	Wettest since: 2011	1983
Aug 2014–Apr 2015 9-Month	12.13" (308.10mm)	15.70" (398.78mm)	-3.57" (-90.68mm)	35th Driest	Driest since: 2014	1977
Aug 2014–Apr 2015 9-Month	12.13" (308.10mm)	15.70" (398.78mm)	-3.57" (-90.68mm)	93rd Wettest	Wettest since: 2011	1983
Jul 2014–Apr 2015 10-Month	12.58" (319.53mm)	16.03" (407.16mm)	-3.45" (-87.63mm)	37th Driest	Driest since: 2014	2021
Jul 2014–Apr 2015 10-Month	12.58" (319.53mm)	16.03" (407.16mm)	-3.45" (-87.63mm)	91st Wettest	Wettest since: 2011	1983
Jun 2014–Apr 2015 11-Month	12.66" (321.56mm)	16.52" (419.61mm)	-3.86" (-98.05mm)	32nd Driest	Driest since: 2014	2021
Jun 2014–Apr 2015 11-Month	12.66" (321.56mm)	16.52" (419.61mm)	-3.86" (-98.05mm)	96th Wettest	Wettest since: 2011	1983
May 2014–Apr 2015 12-Month	13.20" (335.28mm)	17.44" (442.98mm)	-4.24" (-107.70mm)	24th Driest	Driest since: 2014	1977
May 2014–Apr 2015 12-Month	13.20" (335.28mm)	17.44" (442.98mm)	-4.24" (-107.70mm)	104th Wettest	Wettest since: 2012	1983
Nov 2013–Apr 2015 18-Month	21.24" (539.50mm)	31.22" (792.99mm)	-9.98" (-253.49mm)	5th Driest	Driest since: 2014	1977
Nov 2013–Apr 2015 18-Month	21.24" (539.50mm)	31.22" (792.99mm)	-9.98" (-253.49mm)	122nd Wettest	Wettest since: 2013	1983
May 2013–Apr 2015 24-Month	24.50" (622.30mm)	34.90" (886.46mm)	-10.40" (-264.16mm)	6th Driest	Driest since: 2014	1977
May 2013–Apr 2015 24-Month	24.50" (622.30mm)	34.90" (886.46mm)	-10.40" (-264.16mm)	121st Wettest	Wettest since: 2013	1983
May 2012–Apr 2015 36-Month	36.93" (938.02mm)	52.30" (1,328.42mm)	-15.37" (-390.40mm)	3rd Driest	Driest since: 1931	2022
May 2012–Apr 2015 36-Month	36.93" (938.02mm)	52.30" (1,328.42mm)	-15.37" (-390.40mm)	123rd Wettest	Wettest since: 2014	1984
May 2011–Apr 2015 48-Month	50.88" (1,292.35mm)	69.56" (1,766.82mm)	-18.68" (-474.47mm)	1st Driest	Driest since: 2015	2015
May 2011–Apr 2015 48-Month	50.88" (1,292.35mm)	69.56" (1,766.82mm)	-18.68" (-474.47mm)	124th Wettest	Wettest since: 2014	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: 1992	1933
May 2010–Apr 2015 60-Month	72.14" (1,832.36mm)	86.83" (2,205.48mm)	-14.69" (-373.12mm)	115th Wettest	Wettest since: 2014	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings