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 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
October 2015 1-Month	2.90" (73.66mm)	2.16" (54.86mm)	0.74" (18.80mm)	113th Driest	Driest since: 2014	1952
	2.90" (73.66mm)	2.16" (54.86mm)	0.74" (18.80mm)	16th Wettest	Wettest since: 2009	2009
	Ties: 2006
Sep–Oct 2015 2-Month	5.02" (127.51mm)	4.65" (118.11mm)	0.37" (9.40mm)	90th Driest	Driest since: 2012	1952
	5.02" (127.51mm)	4.65" (118.11mm)	0.37" (9.40mm)	39th Wettest	Wettest since: 2014	2018
	Ties: 1949
Aug–Oct 2015 3-Month	7.43" (188.72mm)	7.27" (184.66mm)	0.16" (4.06mm)	69th Driest	Driest since: 2012	1952
Aug–Oct 2015 3-Month	7.43" (188.72mm)	7.27" (184.66mm)	0.16" (4.06mm)	60th Wettest	Wettest since: 2014	2018
Jul–Oct 2015 4-Month	10.66" (270.76mm)	10.05" (255.27mm)	0.61" (15.49mm)	87th Driest	Driest since: 2012	1952
Jul–Oct 2015 4-Month	10.66" (270.76mm)	10.05" (255.27mm)	0.61" (15.49mm)	42nd Wettest	Wettest since: 2014	1941
Jun–Oct 2015 5-Month	14.21" (360.93mm)	12.97" (329.44mm)	1.24" (31.49mm)	107th Driest	Driest since: 2012	1952
Jun–Oct 2015 5-Month	14.21" (360.93mm)	12.97" (329.44mm)	1.24" (31.49mm)	22nd Wettest	Wettest since: 2014	1941
May–Oct 2015 6-Month	18.65" (473.71mm)	15.88" (403.35mm)	2.77" (70.36mm)	122nd Driest	Driest since: 2014	1952
May–Oct 2015 6-Month	18.65" (473.71mm)	15.88" (403.35mm)	2.77" (70.36mm)	7th Wettest	Wettest since: 2009	1941
Apr–Oct 2015 7-Month	21.48" (545.59mm)	18.40" (467.36mm)	3.08" (78.23mm)	124th Driest	Driest since: 2014	1952
Apr–Oct 2015 7-Month	21.48" (545.59mm)	18.40" (467.36mm)	3.08" (78.23mm)	5th Wettest	Wettest since: 2009	1941
Mar–Oct 2015 8-Month	23.61" (599.69mm)	20.91" (531.11mm)	2.70" (68.58mm)	122nd Driest	Driest since: 2014	1956
	23.61" (599.69mm)	20.91" (531.11mm)	2.70" (68.58mm)	7th Wettest	Wettest since: 2009	2019
	Ties: 2017
Feb–Oct 2015 9-Month	25.35" (643.89mm)	23.04" (585.22mm)	2.31" (58.67mm)	116th Driest	Driest since: 2014	1934
Feb–Oct 2015 9-Month	25.35" (643.89mm)	23.04" (585.22mm)	2.31" (58.67mm)	13th Wettest	Wettest since: 2009	2019
Jan–Oct 2015 10-Month	27.18" (690.37mm)	25.36" (644.14mm)	1.82" (46.23mm)	107th Driest	Driest since: 2014	1934
	27.18" (690.37mm)	25.36" (644.14mm)	1.82" (46.23mm)	22nd Wettest	Wettest since: 2009	2019
	Ties: 1991
Dec 2014–Oct 2015 11-Month	29.76" (755.90mm)	27.70" (703.58mm)	2.06" (52.32mm)	103rd Driest	Driest since: 2014	1931
Dec 2014–Oct 2015 11-Month	29.76" (755.90mm)	27.70" (703.58mm)	2.06" (52.32mm)	25th Wettest	Wettest since: 2010	2019
Nov 2014–Oct 2015 12-Month	31.89" (810.01mm)	29.93" (760.22mm)	1.96" (49.79mm)	99th Driest	Driest since: 2014	1934
Nov 2014–Oct 2015 12-Month	31.89" (810.01mm)	29.93" (760.22mm)	1.96" (49.79mm)	29th Wettest	Wettest since: 2009	2019
May 2014–Oct 2015 18-Month	49.16" (1,248.66mm)	45.83" (1,164.08mm)	3.33" (84.58mm)	106th Driest	Driest since: 2014	1931
	49.16" (1,248.66mm)	45.83" (1,164.08mm)	3.33" (84.58mm)	22nd Wettest	Wettest since: 2010	2019
	Ties: 1984
Nov 2013–Oct 2015 24-Month	62.28" (1,581.91mm)	59.90" (1,521.46mm)	2.38" (60.45mm)	88th Driest	Driest since: 2014	1931
Nov 2013–Oct 2015 24-Month	62.28" (1,581.91mm)	59.90" (1,521.46mm)	2.38" (60.45mm)	39th Wettest	Wettest since: 2010	2019
Nov 2012–Oct 2015 36-Month	93.29" (2,369.57mm)	89.86" (2,282.44mm)	3.43" (87.13mm)	95th Driest	Driest since: 2014	1956
Nov 2012–Oct 2015 36-Month	93.29" (2,369.57mm)	89.86" (2,282.44mm)	3.43" (87.13mm)	31st Wettest	Wettest since: 2011	2019
Nov 2011–Oct 2015 48-Month	121.35" (3,082.29mm)	119.78" (3,042.41mm)	1.57" (39.88mm)	72nd Driest	Driest since: 2014	1956
Nov 2011–Oct 2015 48-Month	121.35" (3,082.29mm)	119.78" (3,042.41mm)	1.57" (39.88mm)	53rd Wettest	Wettest since: 2012	2019
Nov 2010–Oct 2015 60-Month	151.39" (3,845.31mm)	149.66" (3,801.36mm)	1.73" (43.95mm)	71st Driest	Driest since: 2014	1934
Nov 2010–Oct 2015 60-Month	151.39" (3,845.31mm)	149.66" (3,801.36mm)	1.73" (43.95mm)	53rd Wettest	Wettest since: 2013	2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on February 2, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings