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 1979

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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 1979 1-Month	3.07" (77.98mm)	2.52" (64.01mm)	0.55" (13.97mm)	115th Driest	Driest since: 1978	1987
April 1979 1-Month	3.07" (77.98mm)	2.52" (64.01mm)	0.55" (13.97mm)	14th Wettest	Wettest since: 1973	1957
Mar–Apr 1979 2-Month	5.87" (149.10mm)	5.03" (127.76mm)	0.84" (21.34mm)	112th Driest	Driest since: 1978	1910
Mar–Apr 1979 2-Month	5.87" (149.10mm)	5.03" (127.76mm)	0.84" (21.34mm)	17th Wettest	Wettest since: 1975	1973
Feb–Apr 1979 3-Month	8.47" (215.14mm)	7.16" (181.86mm)	1.31" (33.28mm)	118th Driest	Driest since: 1978	1910
Feb–Apr 1979 3-Month	8.47" (215.14mm)	7.16" (181.86mm)	1.31" (33.28mm)	11th Wettest	Wettest since: 1975	1983
Jan–Apr 1979 4-Month	11.78" (299.21mm)	9.48" (240.79mm)	2.30" (58.42mm)	127th Driest	Driest since: 1978	1910
Jan–Apr 1979 4-Month	11.78" (299.21mm)	9.48" (240.79mm)	2.30" (58.42mm)	2nd Wettest	Wettest to Date	1998
Dec 1978–Apr 1979 5-Month	14.31" (363.47mm)	11.82" (300.23mm)	2.49" (63.24mm)	123rd Driest	Driest since: 1978	1931
Dec 1978–Apr 1979 5-Month	14.31" (363.47mm)	11.82" (300.23mm)	2.49" (63.24mm)	5th Wettest	Wettest since: 1973	1983
Nov 1978–Apr 1979 6-Month	16.91" (429.51mm)	14.05" (356.87mm)	2.86" (72.64mm)	120th Driest	Driest since: 1978	1977
Nov 1978–Apr 1979 6-Month	16.91" (429.51mm)	14.05" (356.87mm)	2.86" (72.64mm)	8th Wettest	Wettest since: 1973	1983
Oct 1978–Apr 1979 7-Month	18.02" (457.71mm)	16.22" (411.99mm)	1.80" (45.72mm)	108th Driest	Driest since: 1978	1981
Oct 1978–Apr 1979 7-Month	18.02" (457.71mm)	16.22" (411.99mm)	1.80" (45.72mm)	20th Wettest	Wettest since: 1974	1983
Sep 1978–Apr 1979 8-Month	20.46" (519.68mm)	18.71" (475.23mm)	1.75" (44.45mm)	106th Driest	Driest since: 1977	1918
Sep 1978–Apr 1979 8-Month	20.46" (519.68mm)	18.71" (475.23mm)	1.75" (44.45mm)	22nd Wettest	Wettest since: 1978	2019
Aug 1978–Apr 1979 9-Month	23.23" (590.04mm)	21.33" (541.78mm)	1.90" (48.26mm)	109th Driest	Driest since: 1977	1918
	23.23" (590.04mm)	21.33" (541.78mm)	1.90" (48.26mm)	19th Wettest	Wettest since: 1978	2019
	Ties: 1995
Jul 1978–Apr 1979 10-Month	25.98" (659.89mm)	24.12" (612.65mm)	1.86" (47.24mm)	105th Driest	Driest since: 1977	1931
Jul 1978–Apr 1979 10-Month	25.98" (659.89mm)	24.12" (612.65mm)	1.86" (47.24mm)	23rd Wettest	Wettest since: 1978	2019
Jun 1978–Apr 1979 11-Month	28.53" (724.66mm)	27.04" (686.82mm)	1.49" (37.84mm)	96th Driest	Driest since: 1977	1931
Jun 1978–Apr 1979 11-Month	28.53" (724.66mm)	27.04" (686.82mm)	1.49" (37.84mm)	32nd Wettest	Wettest since: 1978	2019
May 1978–Apr 1979 12-Month	32.17" (817.12mm)	29.95" (760.73mm)	2.22" (56.39mm)	108th Driest	Driest since: 1978	1918
	32.17" (817.12mm)	29.95" (760.73mm)	2.22" (56.39mm)	20th Wettest	Wettest since: 1974	2019
	Ties: 1903, 1927
Nov 1977–Apr 1979 18-Month	47.50" (1,206.50mm)	44.02" (1,118.11mm)	3.48" (88.39mm)	109th Driest	Driest since: 1978	1931
Nov 1977–Apr 1979 18-Month	47.50" (1,206.50mm)	44.02" (1,118.11mm)	3.48" (88.39mm)	18th Wettest	Wettest since: 1975	2020
May 1977–Apr 1979 24-Month	64.18" (1,630.17mm)	59.92" (1,521.97mm)	4.26" (108.20mm)	110th Driest	Driest since: 1978	1955
May 1977–Apr 1979 24-Month	64.18" (1,630.17mm)	59.92" (1,521.97mm)	4.26" (108.20mm)	17th Wettest	Wettest since: 1975	2020
May 1976–Apr 1979 36-Month	90.16" (2,290.06mm)	89.88" (2,282.95mm)	0.28" (7.11mm)	69th Driest	Driest since: 1978	1955
May 1976–Apr 1979 36-Month	90.16" (2,290.06mm)	89.88" (2,282.95mm)	0.28" (7.11mm)	57th Wettest	Wettest since: 1976	2020
May 1975–Apr 1979 48-Month	120.41" (3,058.41mm)	119.77" (3,042.16mm)	0.64" (16.25mm)	62nd Driest	Driest since: 1978	1956
May 1975–Apr 1979 48-Month	120.41" (3,058.41mm)	119.77" (3,042.16mm)	0.64" (16.25mm)	63rd Wettest	Wettest since: 1977	2019
May 1974–Apr 1979 60-Month	152.31" (3,868.67mm)	149.63" (3,800.60mm)	2.68" (68.07mm)	75th Driest	Driest since: 1972	1957
May 1974–Apr 1979 60-Month	152.31" (3,868.67mm)	149.63" (3,800.60mm)	2.68" (68.07mm)	49th Wettest	Wettest since: 1978	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings