National Rankings

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Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, October 2018

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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
October 2018 1-Month	3.43" (87.12mm)	2.16" (54.86mm)	1.27" (32.26mm)	123rd Driest	Driest since: 2017	1952
October 2018 1-Month	3.43" (87.12mm)	2.16" (54.86mm)	1.27" (32.26mm)	6th Wettest	Wettest since: 2009	2009
Sep–Oct 2018 2-Month	7.00" (177.80mm)	4.65" (118.11mm)	2.35" (59.69mm)	128th Driest	Driest since: 2017	1952
Sep–Oct 2018 2-Month	7.00" (177.80mm)	4.65" (118.11mm)	2.35" (59.69mm)	1st Wettest	Wettest to Date	2018
Aug–Oct 2018 3-Month	9.98" (253.49mm)	7.27" (184.66mm)	2.71" (68.83mm)	128th Driest	Driest since: 2017	1952
Aug–Oct 2018 3-Month	9.98" (253.49mm)	7.27" (184.66mm)	2.71" (68.83mm)	1st Wettest	Wettest to Date	2018
Jul–Oct 2018 4-Month	12.84" (326.14mm)	10.05" (255.27mm)	2.79" (70.87mm)	127th Driest	Driest since: 2017	1952
Jul–Oct 2018 4-Month	12.84" (326.14mm)	10.05" (255.27mm)	2.79" (70.87mm)	2nd Wettest	Wettest since: 1941	1941
Jun–Oct 2018 5-Month	15.99" (406.15mm)	12.97" (329.44mm)	3.02" (76.71mm)	127th Driest	Driest since: 2017	1952
Jun–Oct 2018 5-Month	15.99" (406.15mm)	12.97" (329.44mm)	3.02" (76.71mm)	2nd Wettest	Wettest since: 1941	1941
May–Oct 2018 6-Month	19.01" (482.85mm)	15.88" (403.35mm)	3.13" (79.50mm)	126th Driest	Driest since: 2017	1952
May–Oct 2018 6-Month	19.01" (482.85mm)	15.88" (403.35mm)	3.13" (79.50mm)	3rd Wettest	Wettest since: 1941	1941
Apr–Oct 2018 7-Month	21.47" (545.34mm)	18.40" (467.36mm)	3.07" (77.98mm)	123rd Driest	Driest since: 2017	1952
Apr–Oct 2018 7-Month	21.47" (545.34mm)	18.40" (467.36mm)	3.07" (77.98mm)	6th Wettest	Wettest since: 2015	1941
Mar–Oct 2018 8-Month	23.95" (608.33mm)	20.91" (531.11mm)	3.04" (77.22mm)	123rd Driest	Driest since: 2017	1956
Mar–Oct 2018 8-Month	23.95" (608.33mm)	20.91" (531.11mm)	3.04" (77.22mm)	6th Wettest	Wettest since: 2009	2019
Feb–Oct 2018 9-Month	26.84" (681.74mm)	23.04" (585.22mm)	3.80" (96.52mm)	127th Driest	Driest since: 2017	1934
Feb–Oct 2018 9-Month	26.84" (681.74mm)	23.04" (585.22mm)	3.80" (96.52mm)	2nd Wettest	Wettest to Date	2019
Jan–Oct 2018 10-Month	28.69" (728.73mm)	25.36" (644.14mm)	3.33" (84.59mm)	124th Driest	Driest since: 2016	1934
Jan–Oct 2018 10-Month	28.69" (728.73mm)	25.36" (644.14mm)	3.33" (84.59mm)	5th Wettest	Wettest since: 2017	2019
Dec 2017–Oct 2018 11-Month	30.28" (769.11mm)	27.70" (703.58mm)	2.58" (65.53mm)	113th Driest	Driest since: 2015	1931
Dec 2017–Oct 2018 11-Month	30.28" (769.11mm)	27.70" (703.58mm)	2.58" (65.53mm)	15th Wettest	Wettest since: 2017	2019
Nov 2017–Oct 2018 12-Month	31.90" (810.26mm)	29.93" (760.22mm)	1.97" (50.04mm)	100th Driest	Driest since: 2015	1934
Nov 2017–Oct 2018 12-Month	31.90" (810.26mm)	29.93" (760.22mm)	1.97" (50.04mm)	28th Wettest	Wettest since: 2017	2019
May 2017–Oct 2018 18-Month	49.42" (1,255.27mm)	45.83" (1,164.08mm)	3.59" (91.19mm)	111th Driest	Driest since: 2015	1931
May 2017–Oct 2018 18-Month	49.42" (1,255.27mm)	45.83" (1,164.08mm)	3.59" (91.19mm)	17th Wettest	Wettest since: 2017	2019
Nov 2016–Oct 2018 24-Month	65.47" (1,662.94mm)	59.90" (1,521.46mm)	5.57" (141.48mm)	115th Driest	Driest since: 2015	1931
Nov 2016–Oct 2018 24-Month	65.47" (1,662.94mm)	59.90" (1,521.46mm)	5.57" (141.48mm)	12th Wettest	Wettest since: 2017	2019
Nov 2015–Oct 2018 36-Month	99.83" (2,535.68mm)	89.86" (2,282.44mm)	9.97" (253.24mm)	123rd Driest	Driest since: 2017	1956
Nov 2015–Oct 2018 36-Month	99.83" (2,535.68mm)	89.86" (2,282.44mm)	9.97" (253.24mm)	3rd Wettest	Wettest since: 1975	2019
Nov 2014–Oct 2018 48-Month	131.72" (3,345.69mm)	119.78" (3,042.41mm)	11.94" (303.28mm)	121st Driest	Driest since: 2017	1956
Nov 2014–Oct 2018 48-Month	131.72" (3,345.69mm)	119.78" (3,042.41mm)	11.94" (303.28mm)	4th Wettest	Wettest since: 1998	2019
Nov 2013–Oct 2018 60-Month	162.11" (4,117.59mm)	149.66" (3,801.36mm)	12.45" (316.23mm)	117th Driest	Driest since: 2017	1934
Nov 2013–Oct 2018 60-Month	162.11" (4,117.59mm)	149.66" (3,801.36mm)	12.45" (316.23mm)	7th Wettest	Wettest since: 1999	2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 22, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings