Regional Rankings

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Month:

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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 2021

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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 2021 1-Month	1.13" (28.70mm)	1.11" (28.19mm)	0.02" (0.51mm)	74th Driest	Driest since: 2020	1974
	1.13" (28.70mm)	1.11" (28.19mm)	0.02" (0.51mm)	55th Wettest	Wettest since: 2019	2015
	Ties: 1951, 1985
Apr–May 2021 2-Month	1.68" (42.67mm)	2.17" (55.12mm)	-0.49" (-12.45mm)	40th Driest	Driest since: 2020	2002
	1.68" (42.67mm)	2.17" (55.12mm)	-0.49" (-12.45mm)	89th Wettest	Wettest since: 2019	1941
	Ties: 1934, 1943
Mar–May 2021 3-Month	2.77" (70.36mm)	3.33" (84.58mm)	-0.56" (-14.22mm)	38th Driest	Driest since: 2020	2002
Mar–May 2021 3-Month	2.77" (70.36mm)	3.33" (84.58mm)	-0.56" (-14.22mm)	91st Wettest	Wettest since: 2019	1941
Feb–May 2021 4-Month	3.40" (86.36mm)	4.33" (109.98mm)	-0.93" (-23.62mm)	33rd Driest	Driest since: 2018	2002
Feb–May 2021 4-Month	3.40" (86.36mm)	4.33" (109.98mm)	-0.93" (-23.62mm)	96th Wettest	Wettest since: 2020	1905
Jan–May 2021 5-Month	4.22" (107.19mm)	5.31" (134.87mm)	-1.09" (-27.68mm)	37th Driest	Driest since: 2020	1972
	4.22" (107.19mm)	5.31" (134.87mm)	-1.09" (-27.68mm)	92nd Wettest	Wettest since: 2019	1905
	Ties: 1913
Dec 2020–May 2021 6-Month	4.78" (121.41mm)	6.32" (160.53mm)	-1.54" (-39.12mm)	26th Driest	Driest since: 2018	2002
Dec 2020–May 2021 6-Month	4.78" (121.41mm)	6.32" (160.53mm)	-1.54" (-39.12mm)	102nd Wettest	Wettest since: 2020	1905
Nov 2020–May 2021 7-Month	5.28" (134.11mm)	7.21" (183.13mm)	-1.93" (-49.02mm)	23rd Driest	Driest since: 2018	2002
Nov 2020–May 2021 7-Month	5.28" (134.11mm)	7.21" (183.13mm)	-1.93" (-49.02mm)	105th Wettest	Wettest since: 2020	1941
Oct 2020–May 2021 8-Month	5.68" (144.27mm)	8.34" (211.84mm)	-2.66" (-67.57mm)	12th Driest	Driest since: 2018	2002
Oct 2020–May 2021 8-Month	5.68" (144.27mm)	8.34" (211.84mm)	-2.66" (-67.57mm)	116th Wettest	Wettest since: 2020	1941
Sep 2020–May 2021 9-Month	6.23" (158.24mm)	9.71" (246.63mm)	-3.48" (-88.39mm)	4th Driest	Driest since: 2002	2002
Sep 2020–May 2021 9-Month	6.23" (158.24mm)	9.71" (246.63mm)	-3.48" (-88.39mm)	124th Wettest	Wettest since: 2020	1941
Aug 2020–May 2021 10-Month	6.82" (173.23mm)	11.72" (297.69mm)	-4.90" (-124.46mm)	2nd Driest	Driest since: 2002	2002
Aug 2020–May 2021 10-Month	6.82" (173.23mm)	11.72" (297.69mm)	-4.90" (-124.46mm)	126th Wettest	Wettest since: 2020	1941
Jul 2020–May 2021 11-Month	8.18" (207.77mm)	13.59" (345.19mm)	-5.41" (-137.42mm)	1st Driest	Driest since: 2021	2021
Jul 2020–May 2021 11-Month	8.18" (207.77mm)	13.59" (345.19mm)	-5.41" (-137.42mm)	127th Wettest	Wettest since: 2020	1941
Jun 2020–May 2021 12-Month	8.79" (223.27mm)	14.53" (369.06mm)	-5.74" (-145.79mm)	1st Driest	Driest since: 2021	2021
Jun 2020–May 2021 12-Month	8.79" (223.27mm)	14.53" (369.06mm)	-5.74" (-145.79mm)	127th Wettest	Wettest since: 2020	1905
Dec 2019–May 2021 18-Month	14.07" (357.38mm)	20.86" (529.84mm)	-6.79" (-172.46mm)	1st Driest	Driest since: 2021	2021
Dec 2019–May 2021 18-Month	14.07" (357.38mm)	20.86" (529.84mm)	-6.79" (-172.46mm)	126th Wettest	Wettest since: 2020	1942
Jun 2019–May 2021 24-Month	21.02" (533.91mm)	29.05" (737.87mm)	-8.03" (-203.96mm)	1st Driest	Driest since: 2021	2021
Jun 2019–May 2021 24-Month	21.02" (533.91mm)	29.05" (737.87mm)	-8.03" (-203.96mm)	126th Wettest	Wettest since: 2020	1942
Jun 2018–May 2021 36-Month	37.87" (961.90mm)	43.54" (1,105.92mm)	-5.67" (-144.02mm)	14th Driest	Driest since: 2014	2022
Jun 2018–May 2021 36-Month	37.87" (961.90mm)	43.54" (1,105.92mm)	-5.67" (-144.02mm)	112th Wettest	Wettest since: 2020	1907
Jun 2017–May 2021 48-Month	49.06" (1,246.12mm)	58.01" (1,473.45mm)	-8.95" (-227.33mm)	7th Driest	Driest since: 2004	1904
Jun 2017–May 2021 48-Month	49.06" (1,246.12mm)	58.01" (1,473.45mm)	-8.95" (-227.33mm)	118th Wettest	Wettest since: 2020	1986
Jun 2016–May 2021 60-Month	64.51" (1,638.55mm)	72.48" (1,840.99mm)	-7.97" (-202.44mm)	12th Driest	Driest since: 2013	1957
Jun 2016–May 2021 60-Month	64.51" (1,638.55mm)	72.48" (1,840.99mm)	-7.97" (-202.44mm)	112th Wettest	Wettest since: 2020	1987

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