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 2009

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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 2009 1-Month	4.29" (108.97mm)	2.16" (54.86mm)	2.13" (54.11mm)	128th Driest	Driest since: 2008	1952
October 2009 1-Month	4.29" (108.97mm)	2.16" (54.86mm)	2.13" (54.11mm)	1st Wettest	Wettest to Date	2009
Sep–Oct 2009 2-Month	6.83" (173.48mm)	4.65" (118.11mm)	2.18" (55.37mm)	126th Driest	Driest since: 2008	1952
Sep–Oct 2009 2-Month	6.83" (173.48mm)	4.65" (118.11mm)	2.18" (55.37mm)	3rd Wettest	Wettest since: 1941	2018
Aug–Oct 2009 3-Month	9.52" (241.81mm)	7.27" (184.66mm)	2.25" (57.15mm)	126th Driest	Driest since: 2008	1952
Aug–Oct 2009 3-Month	9.52" (241.81mm)	7.27" (184.66mm)	2.25" (57.15mm)	3rd Wettest	Wettest since: 1941	2018
Jul–Oct 2009 4-Month	12.59" (319.79mm)	10.05" (255.27mm)	2.54" (64.52mm)	126th Driest	Driest since: 2008	1952
Jul–Oct 2009 4-Month	12.59" (319.79mm)	10.05" (255.27mm)	2.54" (64.52mm)	3rd Wettest	Wettest since: 1941	1941
Jun–Oct 2009 5-Month	15.60" (396.24mm)	12.97" (329.44mm)	2.63" (66.80mm)	125th Driest	Driest since: 2008	1952
Jun–Oct 2009 5-Month	15.60" (396.24mm)	12.97" (329.44mm)	2.63" (66.80mm)	4th Wettest	Wettest since: 2004	1941
May–Oct 2009 6-Month	18.91" (480.31mm)	15.88" (403.35mm)	3.03" (76.96mm)	124th Driest	Driest since: 2008	1952
May–Oct 2009 6-Month	18.91" (480.31mm)	15.88" (403.35mm)	3.03" (76.96mm)	5th Wettest	Wettest since: 2004	1941
Apr–Oct 2009 7-Month	21.74" (552.20mm)	18.40" (467.36mm)	3.34" (84.84mm)	126th Driest	Driest since: 2008	1952
Apr–Oct 2009 7-Month	21.74" (552.20mm)	18.40" (467.36mm)	3.34" (84.84mm)	3rd Wettest	Wettest since: 1941	1941
Mar–Oct 2009 8-Month	24.44" (620.78mm)	20.91" (531.11mm)	3.53" (89.67mm)	127th Driest	Driest since: 2008	1956
Mar–Oct 2009 8-Month	24.44" (620.78mm)	20.91" (531.11mm)	3.53" (89.67mm)	2nd Wettest	Wettest to Date	2019
Feb–Oct 2009 9-Month	25.99" (660.15mm)	23.04" (585.22mm)	2.95" (74.93mm)	121st Driest	Driest since: 2008	1934
Feb–Oct 2009 9-Month	25.99" (660.15mm)	23.04" (585.22mm)	2.95" (74.93mm)	8th Wettest	Wettest since: 1975	2019
Jan–Oct 2009 10-Month	27.59" (700.79mm)	25.36" (644.14mm)	2.23" (56.65mm)	113th Driest	Driest since: 2008	1934
Jan–Oct 2009 10-Month	27.59" (700.79mm)	25.36" (644.14mm)	2.23" (56.65mm)	16th Wettest	Wettest since: 2004	2019
Dec 2008–Oct 2009 11-Month	30.43" (772.92mm)	27.70" (703.58mm)	2.73" (69.34mm)	115th Driest	Driest since: 2008	1931
Dec 2008–Oct 2009 11-Month	30.43" (772.92mm)	27.70" (703.58mm)	2.73" (69.34mm)	13th Wettest	Wettest since: 1998	2019
Nov 2008–Oct 2009 12-Month	32.38" (822.45mm)	29.93" (760.22mm)	2.45" (62.23mm)	111th Driest	Driest since: 2008	1934
Nov 2008–Oct 2009 12-Month	32.38" (822.45mm)	29.93" (760.22mm)	2.45" (62.23mm)	17th Wettest	Wettest since: 2004	2019
May 2008–Oct 2009 18-Month	49.09" (1,246.89mm)	45.83" (1,164.08mm)	3.26" (82.81mm)	102nd Driest	Driest since: 2008	1931
May 2008–Oct 2009 18-Month	49.09" (1,246.89mm)	45.83" (1,164.08mm)	3.26" (82.81mm)	26th Wettest	Wettest since: 2005	2019
Nov 2007–Oct 2009 24-Month	63.20" (1,605.28mm)	59.90" (1,521.46mm)	3.30" (83.82mm)	99th Driest	Driest since: 2008	1931
Nov 2007–Oct 2009 24-Month	63.20" (1,605.28mm)	59.90" (1,521.46mm)	3.30" (83.82mm)	28th Wettest	Wettest since: 2005	2019
Nov 2006–Oct 2009 36-Month	93.04" (2,363.22mm)	89.86" (2,282.44mm)	3.18" (80.78mm)	91st Driest	Driest since: 2008	1956
Nov 2006–Oct 2009 36-Month	93.04" (2,363.22mm)	89.86" (2,282.44mm)	3.18" (80.78mm)	35th Wettest	Wettest since: 2006	2019
Nov 2005–Oct 2009 48-Month	122.34" (3,107.44mm)	119.78" (3,042.41mm)	2.56" (65.03mm)	84th Driest	Driest since: 2008	1956
Nov 2005–Oct 2009 48-Month	122.34" (3,107.44mm)	119.78" (3,042.41mm)	2.56" (65.03mm)	41st Wettest	Wettest since: 2007	2019
Nov 2004–Oct 2009 60-Month	153.27" (3,893.06mm)	149.66" (3,801.36mm)	3.61" (91.70mm)	87th Driest	Driest since: 2006	1934
Nov 2004–Oct 2009 60-Month	153.27" (3,893.06mm)	149.66" (3,801.36mm)	3.61" (91.70mm)	37th Wettest	Wettest since: 2008	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