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 2022

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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 2022 1-Month	1.24" (31.50mm)	1.33" (33.78mm)	-0.09" (-2.28mm)	68th Driest	Driest since: 2021	1909
	1.24" (31.50mm)	1.33" (33.78mm)	-0.09" (-2.28mm)	61st Wettest	Wettest since: 2020	1935
	Ties: 1930, 1969
Mar–Apr 2022 2-Month	2.12" (53.85mm)	3.67" (93.22mm)	-1.55" (-39.37mm)	18th Driest	Driest since: 2021	2008
	2.12" (53.85mm)	3.67" (93.22mm)	-1.55" (-39.37mm)	111th Wettest	Wettest since: 2020	1983
	Ties: 1931
Feb–Apr 2022 3-Month	2.35" (59.69mm)	6.39" (162.31mm)	-4.04" (-102.62mm)	4th Driest	Driest since: 2013	1997
Feb–Apr 2022 3-Month	2.35" (59.69mm)	6.39" (162.31mm)	-4.04" (-102.62mm)	125th Wettest	Wettest since: 2021	1983
Jan–Apr 2022 4-Month	2.68" (68.07mm)	9.37" (238.00mm)	-6.69" (-169.93mm)	1st Driest	Driest since: 2022	2022
Jan–Apr 2022 4-Month	2.68" (68.07mm)	9.37" (238.00mm)	-6.69" (-169.93mm)	128th Wettest	Wettest since: 2021	1995
Dec 2021–Apr 2022 5-Month	7.23" (183.64mm)	11.92" (302.77mm)	-4.69" (-119.13mm)	12th Driest	Driest since: 2021	1977
Dec 2021–Apr 2022 5-Month	7.23" (183.64mm)	11.92" (302.77mm)	-4.69" (-119.13mm)	116th Wettest	Wettest since: 2020	1978
Nov 2021–Apr 2022 6-Month	7.86" (199.64mm)	13.79" (350.27mm)	-5.93" (-150.63mm)	6th Driest	Driest since: 2021	1977
Nov 2021–Apr 2022 6-Month	7.86" (199.64mm)	13.79" (350.27mm)	-5.93" (-150.63mm)	122nd Wettest	Wettest since: 2020	1983
Oct 2021–Apr 2022 7-Month	10.84" (275.34mm)	14.82" (376.43mm)	-3.98" (-101.09mm)	25th Driest	Driest since: 2021	1977
Oct 2021–Apr 2022 7-Month	10.84" (275.34mm)	14.82" (376.43mm)	-3.98" (-101.09mm)	103rd Wettest	Wettest since: 2019	1983
Sep 2021–Apr 2022 8-Month	11.16" (283.46mm)	15.31" (388.87mm)	-4.15" (-105.41mm)	21st Driest	Driest since: 2021	1977
Sep 2021–Apr 2022 8-Month	11.16" (283.46mm)	15.31" (388.87mm)	-4.15" (-105.41mm)	107th Wettest	Wettest since: 2020	1983
Aug 2021–Apr 2022 9-Month	11.32" (287.53mm)	15.70" (398.78mm)	-4.38" (-111.25mm)	19th Driest	Driest since: 2021	1977
Aug 2021–Apr 2022 9-Month	11.32" (287.53mm)	15.70" (398.78mm)	-4.38" (-111.25mm)	109th Wettest	Wettest since: 2020	1983
Jul 2021–Apr 2022 10-Month	11.84" (300.74mm)	16.03" (407.16mm)	-4.19" (-106.42mm)	23rd Driest	Driest since: 2021	2021
Jul 2021–Apr 2022 10-Month	11.84" (300.74mm)	16.03" (407.16mm)	-4.19" (-106.42mm)	105th Wettest	Wettest since: 2019	1983
Jun 2021–Apr 2022 11-Month	12.00" (304.80mm)	16.52" (419.61mm)	-4.52" (-114.81mm)	19th Driest	Driest since: 2021	2021
Jun 2021–Apr 2022 11-Month	12.00" (304.80mm)	16.52" (419.61mm)	-4.52" (-114.81mm)	109th Wettest	Wettest since: 2019	1983
May 2021–Apr 2022 12-Month	12.34" (313.44mm)	17.44" (442.98mm)	-5.10" (-129.54mm)	14th Driest	Driest since: 2021	1977
May 2021–Apr 2022 12-Month	12.34" (313.44mm)	17.44" (442.98mm)	-5.10" (-129.54mm)	114th Wettest	Wettest since: 2020	1983
Nov 2020–Apr 2022 18-Month	20.09" (510.29mm)	31.22" (792.99mm)	-11.13" (-282.70mm)	3rd Driest	Driest since: 2021	1977
Nov 2020–Apr 2022 18-Month	20.09" (510.29mm)	31.22" (792.99mm)	-11.13" (-282.70mm)	124th Wettest	Wettest since: 2020	1983
May 2020–Apr 2022 24-Month	21.66" (550.16mm)	34.90" (886.46mm)	-13.24" (-336.30mm)	2nd Driest	Driest since: 1977	1977
May 2020–Apr 2022 24-Month	21.66" (550.16mm)	34.90" (886.46mm)	-13.24" (-336.30mm)	125th Wettest	Wettest since: 2021	1983
May 2019–Apr 2022 36-Month	35.96" (913.38mm)	52.30" (1,328.42mm)	-16.34" (-415.04mm)	1st Driest	Driest since: 2022	2022
May 2019–Apr 2022 36-Month	35.96" (913.38mm)	52.30" (1,328.42mm)	-16.34" (-415.04mm)	125th Wettest	Wettest since: 2021	1984
May 2018–Apr 2022 48-Month	56.40" (1,432.56mm)	69.56" (1,766.82mm)	-13.16" (-334.26mm)	11th Driest	Driest since: 2015	2015
May 2018–Apr 2022 48-Month	56.40" (1,432.56mm)	69.56" (1,766.82mm)	-13.16" (-334.26mm)	114th Wettest	Wettest since: 2021	1998
May 2017–Apr 2022 60-Month	69.41" (1,763.01mm)	86.83" (2,205.48mm)	-17.42" (-442.47mm)	4th Driest	Driest since: 1991	1933
May 2017–Apr 2022 60-Month	69.41" (1,763.01mm)	86.83" (2,205.48mm)	-17.42" (-442.47mm)	120th Wettest	Wettest since: 2021	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published December 2022, retrieved on December 8, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings