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, January 1940

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
January 1940 1-Month	1.93" (49.02mm)	2.31" (58.67mm)	-0.38" (-9.65mm)	30th Driest	Driest since: 1934	1981
January 1940 1-Month	1.93" (49.02mm)	2.31" (58.67mm)	-0.38" (-9.65mm)	99th Wettest	Wettest since: 1939	1916
Dec 1939–Jan 1940 2-Month	3.81" (96.77mm)	4.66" (118.36mm)	-0.85" (-21.59mm)	16th Driest	Driest since: 1931	1981
Dec 1939–Jan 1940 2-Month	3.81" (96.77mm)	4.66" (118.36mm)	-0.85" (-21.59mm)	112th Wettest	Wettest since: 1939	1932
Nov 1939–Jan 1940 3-Month	4.80" (121.92mm)	6.89" (175.01mm)	-2.09" (-53.09mm)	3rd Driest	Driest since: 1940	1977
Nov 1939–Jan 1940 3-Month	4.80" (121.92mm)	6.89" (175.01mm)	-2.09" (-53.09mm)	125th Wettest	Wettest since: 1939	2016
Oct 1939–Jan 1940 4-Month	6.40" (162.56mm)	9.06" (230.12mm)	-2.66" (-67.56mm)	2nd Driest	Driest since: 1918	1981
	6.40" (162.56mm)	9.06" (230.12mm)	-2.66" (-67.56mm)	126th Wettest	Wettest since: 1939	2016
	Ties: 1918
Sep 1939–Jan 1940 5-Month	8.02" (203.71mm)	11.55" (293.37mm)	-3.53" (-89.66mm)	1st Driest	Driest since: 1940	1940
Sep 1939–Jan 1940 5-Month	8.02" (203.71mm)	11.55" (293.37mm)	-3.53" (-89.66mm)	127th Wettest	Wettest since: 1939	2019
Aug 1939–Jan 1940 6-Month	10.73" (272.54mm)	14.17" (359.92mm)	-3.44" (-87.38mm)	1st Driest	Driest since: 1940	1940
Aug 1939–Jan 1940 6-Month	10.73" (272.54mm)	14.17" (359.92mm)	-3.44" (-87.38mm)	127th Wettest	Wettest since: 1939	2019
Jul 1939–Jan 1940 7-Month	13.09" (332.49mm)	16.96" (430.78mm)	-3.87" (-98.29mm)	1st Driest	Driest since: 1940	1940
Jul 1939–Jan 1940 7-Month	13.09" (332.49mm)	16.96" (430.78mm)	-3.87" (-98.29mm)	127th Wettest	Wettest since: 1939	2019
Jun 1939–Jan 1940 8-Month	16.41" (416.81mm)	19.88" (504.95mm)	-3.47" (-88.14mm)	5th Driest	Driest since: 1931	1981
Jun 1939–Jan 1940 8-Month	16.41" (416.81mm)	19.88" (504.95mm)	-3.47" (-88.14mm)	123rd Wettest	Wettest since: 1939	2019
May 1939–Jan 1940 9-Month	18.61" (472.69mm)	22.79" (578.87mm)	-4.18" (-106.18mm)	2nd Driest	Driest since: 1918	1918
May 1939–Jan 1940 9-Month	18.61" (472.69mm)	22.79" (578.87mm)	-4.18" (-106.18mm)	126th Wettest	Wettest since: 1939	2016
Apr 1939–Jan 1940 10-Month	20.77" (527.56mm)	25.32" (643.13mm)	-4.55" (-115.57mm)	1st Driest	Driest since: 1940	1940
Apr 1939–Jan 1940 10-Month	20.77" (527.56mm)	25.32" (643.13mm)	-4.55" (-115.57mm)	127th Wettest	Wettest since: 1939	2016
Mar 1939–Jan 1940 11-Month	22.84" (580.14mm)	27.83" (706.88mm)	-4.99" (-126.74mm)	3rd Driest	Driest since: 1931	1957
Mar 1939–Jan 1940 11-Month	22.84" (580.14mm)	27.83" (706.88mm)	-4.99" (-126.74mm)	125th Wettest	Wettest since: 1939	1974
Feb 1939–Jan 1940 12-Month	25.77" (654.56mm)	29.96" (760.98mm)	-4.19" (-106.42mm)	6th Driest	Driest since: 1931	1931
Feb 1939–Jan 1940 12-Month	25.77" (654.56mm)	29.96" (760.98mm)	-4.19" (-106.42mm)	122nd Wettest	Wettest since: 1939	1974
Aug 1938–Jan 1940 18-Month	37.79" (959.87mm)	44.14" (1,121.16mm)	-6.35" (-161.29mm)	2nd Driest	Driest since: 1940	1955
Aug 1938–Jan 1940 18-Month	37.79" (959.87mm)	44.14" (1,121.16mm)	-6.35" (-161.29mm)	125th Wettest	Wettest since: 1939	2020
Feb 1938–Jan 1940 24-Month	55.89" (1,419.61mm)	59.93" (1,522.22mm)	-4.04" (-102.61mm)	17th Driest	Driest since: 1935	1918
Feb 1938–Jan 1940 24-Month	55.89" (1,419.61mm)	59.93" (1,522.22mm)	-4.04" (-102.61mm)	110th Wettest	Wettest since: 1939	2020
Feb 1937–Jan 1940 36-Month	84.86" (2,155.44mm)	89.86" (2,282.44mm)	-5.00" (-127.00mm)	15th Driest	Driest since: 1937	1957
Feb 1937–Jan 1940 36-Month	84.86" (2,155.44mm)	89.86" (2,282.44mm)	-5.00" (-127.00mm)	111th Wettest	Wettest since: 1939	2020
Feb 1936–Jan 1940 48-Month	112.91" (2,867.91mm)	119.76" (3,041.90mm)	-6.85" (-173.99mm)	9th Driest	Driest since: 1937	1957
Feb 1936–Jan 1940 48-Month	112.91" (2,867.91mm)	119.76" (3,041.90mm)	-6.85" (-173.99mm)	116th Wettest	Wettest since: 1939	2020
Feb 1935–Jan 1940 60-Month	142.87" (3,628.90mm)	149.63" (3,800.60mm)	-6.76" (-171.70mm)	11th Driest	Driest since: 1938	1957
Feb 1935–Jan 1940 60-Month	142.87" (3,628.90mm)	149.63" (3,800.60mm)	-6.76" (-171.70mm)	113th Wettest	Wettest since: 1939	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on February 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings