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, September 1964

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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
September 1964 1-Month	2.54" (64.52mm)	2.49" (63.25mm)	0.05" (1.27mm)	75th Driest	Driest since: 1963	1956
	2.54" (64.52mm)	2.49" (63.25mm)	0.05" (1.27mm)	54th Wettest	Wettest since: 1962	1986
	Ties: 1997, 2009
Aug–Sep 1964 2-Month	5.41" (137.41mm)	5.11" (129.79mm)	0.30" (7.62mm)	94th Driest	Driest since: 1963	1956
	5.41" (137.41mm)	5.11" (129.79mm)	0.30" (7.62mm)	35th Wettest	Wettest since: 1961	1977
	Ties: 1989
Jul–Sep 1964 3-Month	8.02" (203.71mm)	7.88" (200.15mm)	0.14" (3.56mm)	77th Driest	Driest since: 1963	1930
	8.02" (203.71mm)	7.88" (200.15mm)	0.14" (3.56mm)	52nd Wettest	Wettest since: 1961	1915
	Ties: 2003
Jun–Sep 1964 4-Month	10.83" (275.08mm)	10.81" (274.57mm)	0.02" (0.51mm)	62nd Driest	Driest since: 1963	1930
	10.83" (275.08mm)	10.81" (274.57mm)	0.02" (0.51mm)	67th Wettest	Wettest since: 1962	1915
	Ties: 1919
May–Sep 1964 5-Month	13.08" (332.23mm)	13.72" (348.49mm)	-0.64" (-16.26mm)	33rd Driest	Driest since: 1963	1956
May–Sep 1964 5-Month	13.08" (332.23mm)	13.72" (348.49mm)	-0.64" (-16.26mm)	96th Wettest	Wettest since: 1962	1915
Apr–Sep 1964 6-Month	16.37" (415.80mm)	16.24" (412.50mm)	0.13" (3.30mm)	67th Driest	Driest since: 1963	1956
Apr–Sep 1964 6-Month	16.37" (415.80mm)	16.24" (412.50mm)	0.13" (3.30mm)	62nd Wettest	Wettest since: 1961	1915
Mar–Sep 1964 7-Month	19.20" (487.68mm)	18.75" (476.25mm)	0.45" (11.43mm)	77th Driest	Driest since: 1963	1956
Mar–Sep 1964 7-Month	19.20" (487.68mm)	18.75" (476.25mm)	0.45" (11.43mm)	52nd Wettest	Wettest since: 1961	1973
Feb–Sep 1964 8-Month	20.76" (527.30mm)	20.88" (530.35mm)	-0.12" (-3.05mm)	59th Driest	Driest since: 1963	1930
Feb–Sep 1964 8-Month	20.76" (527.30mm)	20.88" (530.35mm)	-0.12" (-3.05mm)	70th Wettest	Wettest since: 1961	2019
Jan–Sep 1964 9-Month	23.19" (589.03mm)	23.20" (589.28mm)	-0.01" (-0.25mm)	61st Driest	Driest since: 1963	1934
Jan–Sep 1964 9-Month	23.19" (589.03mm)	23.20" (589.28mm)	-0.01" (-0.25mm)	68th Wettest	Wettest since: 1961	2019
Dec 1963–Sep 1964 10-Month	24.67" (626.62mm)	25.54" (648.72mm)	-0.87" (-22.10mm)	42nd Driest	Driest since: 1963	1931
Dec 1963–Sep 1964 10-Month	24.67" (626.62mm)	25.54" (648.72mm)	-0.87" (-22.10mm)	86th Wettest	Wettest since: 1962	2019
Nov 1963–Sep 1964 11-Month	27.33" (694.18mm)	27.77" (705.36mm)	-0.44" (-11.18mm)	51st Driest	Driest since: 1963	1934
Nov 1963–Sep 1964 11-Month	27.33" (694.18mm)	27.77" (705.36mm)	-0.44" (-11.18mm)	77th Wettest	Wettest since: 1962	2019
Oct 1963–Sep 1964 12-Month	28.29" (718.57mm)	29.94" (760.48mm)	-1.65" (-41.91mm)	28th Driest	Driest since: 1963	1934
Oct 1963–Sep 1964 12-Month	28.29" (718.57mm)	29.94" (760.48mm)	-1.65" (-41.91mm)	100th Wettest	Wettest since: 1962	2019
Apr 1963–Sep 1964 18-Month	43.12" (1,095.25mm)	46.20" (1,173.48mm)	-3.08" (-78.23mm)	20th Driest	Driest since: 1963	1931
Apr 1963–Sep 1964 18-Month	43.12" (1,095.25mm)	46.20" (1,173.48mm)	-3.08" (-78.23mm)	108th Wettest	Wettest since: 1962	2019
Oct 1962–Sep 1964 24-Month	54.85" (1,393.19mm)	59.92" (1,521.97mm)	-5.07" (-128.78mm)	10th Driest	Driest since: 1956	1918
Oct 1962–Sep 1964 24-Month	54.85" (1,393.19mm)	59.92" (1,521.97mm)	-5.07" (-128.78mm)	117th Wettest	Wettest since: 1963	2020
Oct 1961–Sep 1964 36-Month	84.55" (2,147.57mm)	89.87" (2,282.70mm)	-5.32" (-135.13mm)	12th Driest	Driest since: 1956	1956
Oct 1961–Sep 1964 36-Month	84.55" (2,147.57mm)	89.87" (2,282.70mm)	-5.32" (-135.13mm)	114th Wettest	Wettest since: 1963	2019
Oct 1960–Sep 1964 48-Month	115.09" (2,923.29mm)	119.78" (3,042.41mm)	-4.69" (-119.12mm)	21st Driest	Driest since: 1957	1956
Oct 1960–Sep 1964 48-Month	115.09" (2,923.29mm)	119.78" (3,042.41mm)	-4.69" (-119.12mm)	104th Wettest	Wettest since: 1963	2019
Oct 1959–Sep 1964 60-Month	144.93" (3,681.22mm)	149.66" (3,801.36mm)	-4.73" (-120.14mm)	23rd Driest	Driest since: 1963	1956
Oct 1959–Sep 1964 60-Month	144.93" (3,681.22mm)	149.66" (3,801.36mm)	-4.73" (-120.14mm)	101st Wettest	Wettest since: 1962	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published May 2023, retrieved on June 3, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings