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 1939

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
October 1939 1-Month	1.60" (40.64mm)	2.16" (54.86mm)	-0.56" (-14.22mm)	20th Driest	Driest since: 1938	1952
October 1939 1-Month	1.60" (40.64mm)	2.16" (54.86mm)	-0.56" (-14.22mm)	109th Wettest	Wettest since: 1937	2009
Sep–Oct 1939 2-Month	3.22" (81.79mm)	4.65" (118.11mm)	-1.43" (-36.32mm)	6th Driest	Driest since: 1922	1952
Sep–Oct 1939 2-Month	3.22" (81.79mm)	4.65" (118.11mm)	-1.43" (-36.32mm)	123rd Wettest	Wettest since: 1938	2018
Aug–Oct 1939 3-Month	5.93" (150.62mm)	7.27" (184.66mm)	-1.34" (-34.04mm)	11th Driest	Driest since: 1938	1952
Aug–Oct 1939 3-Month	5.93" (150.62mm)	7.27" (184.66mm)	-1.34" (-34.04mm)	118th Wettest	Wettest since: 1937	2018
Jul–Oct 1939 4-Month	8.29" (210.57mm)	10.05" (255.27mm)	-1.76" (-44.70mm)	5th Driest	Driest since: 1895	1952
Jul–Oct 1939 4-Month	8.29" (210.57mm)	10.05" (255.27mm)	-1.76" (-44.70mm)	124th Wettest	Wettest since: 1938	1941
Jun–Oct 1939 5-Month	11.61" (294.89mm)	12.97" (329.44mm)	-1.36" (-34.55mm)	18th Driest	Driest since: 1936	1952
Jun–Oct 1939 5-Month	11.61" (294.89mm)	12.97" (329.44mm)	-1.36" (-34.55mm)	111th Wettest	Wettest since: 1938	1941
May–Oct 1939 6-Month	13.81" (350.77mm)	15.88" (403.35mm)	-2.07" (-52.58mm)	10th Driest	Driest since: 1936	1952
May–Oct 1939 6-Month	13.81" (350.77mm)	15.88" (403.35mm)	-2.07" (-52.58mm)	119th Wettest	Wettest since: 1938	1941
Apr–Oct 1939 7-Month	15.97" (405.64mm)	18.40" (467.36mm)	-2.43" (-61.72mm)	9th Driest	Driest since: 1936	1952
Apr–Oct 1939 7-Month	15.97" (405.64mm)	18.40" (467.36mm)	-2.43" (-61.72mm)	120th Wettest	Wettest since: 1938	1941
Mar–Oct 1939 8-Month	18.04" (458.22mm)	20.91" (531.11mm)	-2.87" (-72.89mm)	9th Driest	Driest since: 1936	1956
Mar–Oct 1939 8-Month	18.04" (458.22mm)	20.91" (531.11mm)	-2.87" (-72.89mm)	120th Wettest	Wettest since: 1938	2019
Feb–Oct 1939 9-Month	20.97" (532.64mm)	23.04" (585.22mm)	-2.07" (-52.58mm)	16th Driest	Driest since: 1936	1934
Feb–Oct 1939 9-Month	20.97" (532.64mm)	23.04" (585.22mm)	-2.07" (-52.58mm)	113th Wettest	Wettest since: 1938	2019
Jan–Oct 1939 10-Month	23.46" (595.88mm)	25.36" (644.14mm)	-1.90" (-48.26mm)	18th Driest	Driest since: 1936	1934
Jan–Oct 1939 10-Month	23.46" (595.88mm)	25.36" (644.14mm)	-1.90" (-48.26mm)	111th Wettest	Wettest since: 1938	2019
Dec 1938–Oct 1939 11-Month	25.17" (639.32mm)	27.70" (703.58mm)	-2.53" (-64.26mm)	13th Driest	Driest since: 1936	1931
Dec 1938–Oct 1939 11-Month	25.17" (639.32mm)	27.70" (703.58mm)	-2.53" (-64.26mm)	115th Wettest	Wettest since: 1938	2019
Nov 1938–Oct 1939 12-Month	27.18" (690.37mm)	29.93" (760.22mm)	-2.75" (-69.85mm)	17th Driest	Driest since: 1936	1934
Nov 1938–Oct 1939 12-Month	27.18" (690.37mm)	29.93" (760.22mm)	-2.75" (-69.85mm)	111th Wettest	Wettest since: 1938	2019
May 1938–Oct 1939 18-Month	42.69" (1,084.33mm)	45.83" (1,164.08mm)	-3.14" (-79.75mm)	19th Driest	Driest since: 1934	1931
May 1938–Oct 1939 18-Month	42.69" (1,084.33mm)	45.83" (1,164.08mm)	-3.14" (-79.75mm)	109th Wettest	Wettest since: 1938	2019
Nov 1937–Oct 1939 24-Month	57.79" (1,467.87mm)	59.90" (1,521.46mm)	-2.11" (-53.59mm)	31st Driest	Driest since: 1937	1931
Nov 1937–Oct 1939 24-Month	57.79" (1,467.87mm)	59.90" (1,521.46mm)	-2.11" (-53.59mm)	96th Wettest	Wettest since: 1938	2019
Nov 1936–Oct 1939 36-Month	87.64" (2,226.06mm)	89.86" (2,282.44mm)	-2.22" (-56.38mm)	36th Driest	Driest since: 1938	1956
Nov 1936–Oct 1939 36-Month	87.64" (2,226.06mm)	89.86" (2,282.44mm)	-2.22" (-56.38mm)	90th Wettest	Wettest since: 1929	2019
Nov 1935–Oct 1939 48-Month	114.80" (2,915.92mm)	119.78" (3,042.41mm)	-4.98" (-126.49mm)	15th Driest	Driest since: 1937	1956
Nov 1935–Oct 1939 48-Month	114.80" (2,915.92mm)	119.78" (3,042.41mm)	-4.98" (-126.49mm)	110th Wettest	Wettest since: 1938	2019
Nov 1934–Oct 1939 60-Month	145.39" (3,692.91mm)	149.66" (3,801.36mm)	-4.27" (-108.45mm)	26th Driest	Driest since: 1938	1934
Nov 1934–Oct 1939 60-Month	145.39" (3,692.91mm)	149.66" (3,801.36mm)	-4.27" (-108.45mm)	98th Wettest	Wettest since: 1930	2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on February 6, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings