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.

Southwest Climate Region

Precipitation Rankings, May 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
May 2015 1-Month	2.93" (74.42mm)	1.11" (28.19mm)	1.82" (46.23mm)	128th Driest	Driest since: 2014	1974
May 2015 1-Month	2.93" (74.42mm)	1.11" (28.19mm)	1.82" (46.23mm)	1st Wettest	Wettest to Date	2015
Apr–May 2015 2-Month	3.91" (99.31mm)	2.17" (55.12mm)	1.74" (44.19mm)	125th Driest	Driest since: 2014	2002
Apr–May 2015 2-Month	3.91" (99.31mm)	2.17" (55.12mm)	1.74" (44.19mm)	4th Wettest	Wettest since: 1957	1941
Mar–May 2015 3-Month	4.80" (121.92mm)	3.33" (84.58mm)	1.47" (37.34mm)	121st Driest	Driest since: 2014	2002
Mar–May 2015 3-Month	4.80" (121.92mm)	3.33" (84.58mm)	1.47" (37.34mm)	8th Wettest	Wettest since: 1995	1941
Feb–May 2015 4-Month	5.64" (143.26mm)	4.33" (109.98mm)	1.31" (33.28mm)	113th Driest	Driest since: 2014	2002
Feb–May 2015 4-Month	5.64" (143.26mm)	4.33" (109.98mm)	1.31" (33.28mm)	16th Wettest	Wettest since: 1995	1905
Jan–May 2015 5-Month	6.87" (174.50mm)	5.31" (134.87mm)	1.56" (39.63mm)	115th Driest	Driest since: 2014	1972
Jan–May 2015 5-Month	6.87" (174.50mm)	5.31" (134.87mm)	1.56" (39.63mm)	14th Wettest	Wettest since: 2005	1905
Dec 2014–May 2015 6-Month	8.05" (204.47mm)	6.32" (160.53mm)	1.73" (43.94mm)	111th Driest	Driest since: 2014	2002
	8.05" (204.47mm)	6.32" (160.53mm)	1.73" (43.94mm)	17th Wettest	Wettest since: 2005	1905
	Ties: 1906
Nov 2014–May 2015 7-Month	8.68" (220.47mm)	7.21" (183.13mm)	1.47" (37.34mm)	104th Driest	Driest since: 2014	2002
Nov 2014–May 2015 7-Month	8.68" (220.47mm)	7.21" (183.13mm)	1.47" (37.34mm)	24th Wettest	Wettest since: 2005	1941
Oct 2014–May 2015 8-Month	9.34" (237.24mm)	8.34" (211.84mm)	1.00" (25.40mm)	97th Driest	Driest since: 2014	2002
	9.34" (237.24mm)	8.34" (211.84mm)	1.00" (25.40mm)	31st Wettest	Wettest since: 2005	1941
	Ties: 1957
Sep 2014–May 2015 9-Month	11.95" (303.53mm)	9.71" (246.63mm)	2.24" (56.90mm)	109th Driest	Driest since: 2014	2002
Sep 2014–May 2015 9-Month	11.95" (303.53mm)	9.71" (246.63mm)	2.24" (56.90mm)	19th Wettest	Wettest since: 2005	1941
Aug 2014–May 2015 10-Month	14.54" (369.32mm)	11.72" (297.69mm)	2.82" (71.63mm)	114th Driest	Driest since: 2014	2002
Aug 2014–May 2015 10-Month	14.54" (369.32mm)	11.72" (297.69mm)	2.82" (71.63mm)	14th Wettest	Wettest since: 2005	1941
Jul 2014–May 2015 11-Month	16.86" (428.24mm)	13.59" (345.19mm)	3.27" (83.05mm)	116th Driest	Driest since: 2014	2021
Jul 2014–May 2015 11-Month	16.86" (428.24mm)	13.59" (345.19mm)	3.27" (83.05mm)	12th Wettest	Wettest since: 2005	1941
Jun 2014–May 2015 12-Month	17.36" (440.94mm)	14.53" (369.06mm)	2.83" (71.88mm)	112th Driest	Driest since: 2014	2021
Jun 2014–May 2015 12-Month	17.36" (440.94mm)	14.53" (369.06mm)	2.83" (71.88mm)	16th Wettest	Wettest since: 2005	1905
Dec 2013–May 2015 18-Month	21.60" (548.64mm)	20.86" (529.84mm)	0.74" (18.80mm)	92nd Driest	Driest since: 2014	2021
	21.60" (548.64mm)	20.86" (529.84mm)	0.74" (18.80mm)	35th Wettest	Wettest since: 2005	1942
	Ties: 1988
Jun 2013–May 2015 24-Month	31.86" (809.24mm)	29.05" (737.87mm)	2.81" (71.37mm)	104th Driest	Driest since: 2014	2021
Jun 2013–May 2015 24-Month	31.86" (809.24mm)	29.05" (737.87mm)	2.81" (71.37mm)	23rd Wettest	Wettest since: 1999	1942
Jun 2012–May 2015 36-Month	42.53" (1,080.26mm)	43.54" (1,105.92mm)	-1.01" (-25.66mm)	59th Driest	Driest since: 2014	2022
Jun 2012–May 2015 36-Month	42.53" (1,080.26mm)	43.54" (1,105.92mm)	-1.01" (-25.66mm)	67th Wettest	Wettest since: 2009	1907
Jun 2011–May 2015 48-Month	53.89" (1,368.81mm)	58.01" (1,473.45mm)	-4.12" (-104.64mm)	31st Driest	Driest since: 2014	1904
	53.89" (1,368.81mm)	58.01" (1,473.45mm)	-4.12" (-104.64mm)	94th Wettest	Wettest since: 2011	1986
	Ties: 1937
Jun 2010–May 2015 60-Month	67.86" (1,723.64mm)	72.48" (1,840.99mm)	-4.62" (-117.35mm)	30th Driest	Driest since: 2014	1957
Jun 2010–May 2015 60-Month	67.86" (1,723.64mm)	72.48" (1,840.99mm)	-4.62" (-117.35mm)	94th Wettest	Wettest since: 2011	1987

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings