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, April 2020

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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
April 2020 1-Month	2.52" (64.01mm)	2.52" (64.01mm)	0.00" (0.00mm)	63rd Driest	Driest since: 2018	1987
	2.52" (64.01mm)	2.52" (64.01mm)	0.00" (0.00mm)	66th Wettest	Wettest since: 2019	1957
	Ties: 1965, 1982
Mar–Apr 2020 2-Month	5.38" (136.65mm)	5.03" (127.76mm)	0.35" (8.89mm)	93rd Driest	Driest since: 2018	1910
Mar–Apr 2020 2-Month	5.38" (136.65mm)	5.03" (127.76mm)	0.35" (8.89mm)	36th Wettest	Wettest since: 2019	1973
Feb–Apr 2020 3-Month	7.83" (198.88mm)	7.16" (181.86mm)	0.67" (17.02mm)	101st Driest	Driest since: 2018	1910
	7.83" (198.88mm)	7.16" (181.86mm)	0.67" (17.02mm)	28th Wettest	Wettest since: 2019	1983
	Ties: 2018
Jan–Apr 2020 4-Month	10.59" (268.99mm)	9.47" (240.54mm)	1.12" (28.45mm)	111th Driest	Driest since: 2018	1910
Jan–Apr 2020 4-Month	10.59" (268.99mm)	9.47" (240.54mm)	1.12" (28.45mm)	18th Wettest	Wettest since: 2019	1998
Dec 2019–Apr 2020 5-Month	13.16" (334.26mm)	11.82" (300.23mm)	1.34" (34.03mm)	111th Driest	Driest since: 2018	1931
Dec 2019–Apr 2020 5-Month	13.16" (334.26mm)	11.82" (300.23mm)	1.34" (34.03mm)	17th Wettest	Wettest since: 2019	1983
Nov 2019–Apr 2020 6-Month	15.10" (383.54mm)	14.05" (356.87mm)	1.05" (26.67mm)	101st Driest	Driest since: 2018	1977
	15.10" (383.54mm)	14.05" (356.87mm)	1.05" (26.67mm)	27th Wettest	Wettest since: 2019	1983
	Ties: 1938
Oct 2019–Apr 2020 7-Month	18.29" (464.57mm)	16.22" (411.99mm)	2.07" (52.58mm)	114th Driest	Driest since: 2018	1981
Oct 2019–Apr 2020 7-Month	18.29" (464.57mm)	16.22" (411.99mm)	2.07" (52.58mm)	14th Wettest	Wettest since: 2019	1983
Sep 2019–Apr 2020 8-Month	20.74" (526.80mm)	18.71" (475.23mm)	2.03" (51.57mm)	111th Driest	Driest since: 2018	1918
	20.74" (526.80mm)	18.71" (475.23mm)	2.03" (51.57mm)	17th Wettest	Wettest since: 2019	2019
	Ties: 1978
Aug 2019–Apr 2020 9-Month	23.52" (597.41mm)	21.33" (541.78mm)	2.19" (55.63mm)	110th Driest	Driest since: 2018	1918
Aug 2019–Apr 2020 9-Month	23.52" (597.41mm)	21.33" (541.78mm)	2.19" (55.63mm)	18th Wettest	Wettest since: 2019	2019
Jul 2019–Apr 2020 10-Month	26.28" (667.51mm)	24.12" (612.65mm)	2.16" (54.86mm)	111th Driest	Driest since: 2018	1931
	26.28" (667.51mm)	24.12" (612.65mm)	2.16" (54.86mm)	17th Wettest	Wettest since: 2019	2019
	Ties: 1903
Jun 2019–Apr 2020 11-Month	29.65" (753.11mm)	27.04" (686.82mm)	2.61" (66.29mm)	114th Driest	Driest since: 2018	1931
Jun 2019–Apr 2020 11-Month	29.65" (753.11mm)	27.04" (686.82mm)	2.61" (66.29mm)	14th Wettest	Wettest since: 2019	2019
May 2019–Apr 2020 12-Month	34.12" (866.65mm)	29.95" (760.73mm)	4.17" (105.92mm)	122nd Driest	Driest since: 2018	1918
May 2019–Apr 2020 12-Month	34.12" (866.65mm)	29.95" (760.73mm)	4.17" (105.92mm)	6th Wettest	Wettest since: 2019	2019
Nov 2018–Apr 2020 18-Month	51.37" (1,304.80mm)	44.02" (1,118.11mm)	7.35" (186.69mm)	126th Driest	Driest since: 2019	1931
Nov 2018–Apr 2020 18-Month	51.37" (1,304.80mm)	44.02" (1,118.11mm)	7.35" (186.69mm)	1st Wettest	Wettest to Date	2020
May 2018–Apr 2020 24-Month	70.38" (1,787.65mm)	59.92" (1,521.97mm)	10.46" (265.68mm)	126th Driest	Driest since: 2019	1955
May 2018–Apr 2020 24-Month	70.38" (1,787.65mm)	59.92" (1,521.97mm)	10.46" (265.68mm)	1st Wettest	Wettest to Date	2020
May 2017–Apr 2020 36-Month	100.79" (2,560.07mm)	89.88" (2,282.95mm)	10.91" (277.12mm)	125th Driest	Driest since: 2019	1955
May 2017–Apr 2020 36-Month	100.79" (2,560.07mm)	89.88" (2,282.95mm)	10.91" (277.12mm)	1st Wettest	Wettest to Date	2020
May 2016–Apr 2020 48-Month	133.90" (3,401.06mm)	119.77" (3,042.16mm)	14.13" (358.90mm)	123rd Driest	Driest since: 2018	1956
May 2016–Apr 2020 48-Month	133.90" (3,401.06mm)	119.77" (3,042.16mm)	14.13" (358.90mm)	2nd Wettest	Wettest since: 2019	2019
May 2015–Apr 2020 60-Month	169.85" (4,314.19mm)	149.63" (3,800.60mm)	20.22" (513.59mm)	123rd Driest	Driest since: 2019	1957
May 2015–Apr 2020 60-Month	169.85" (4,314.19mm)	149.63" (3,800.60mm)	20.22" (513.59mm)	1st Wettest	Wettest to Date	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on January 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings