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 1970

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
September 1970 1-Month	3.06" (77.72mm)	2.49" (63.25mm)	0.57" (14.47mm)	118th Driest	Driest since: 1969	1956
September 1970 1-Month	3.06" (77.72mm)	2.49" (63.25mm)	0.57" (14.47mm)	11th Wettest	Wettest since: 1965	1986
Aug–Sep 1970 2-Month	5.43" (137.92mm)	5.11" (129.79mm)	0.32" (8.13mm)	95th Driest	Driest since: 1969	1956
Aug–Sep 1970 2-Month	5.43" (137.92mm)	5.11" (129.79mm)	0.32" (8.13mm)	34th Wettest	Wettest since: 1966	1977
Jul–Sep 1970 3-Month	7.84" (199.14mm)	7.88" (200.15mm)	-0.04" (-1.01mm)	62nd Driest	Driest since: 1969	1930
Jul–Sep 1970 3-Month	7.84" (199.14mm)	7.88" (200.15mm)	-0.04" (-1.01mm)	67th Wettest	Wettest since: 1968	1915
Jun–Sep 1970 4-Month	10.61" (269.49mm)	10.81" (274.57mm)	-0.20" (-5.08mm)	47th Driest	Driest since: 1966	1930
Jun–Sep 1970 4-Month	10.61" (269.49mm)	10.81" (274.57mm)	-0.20" (-5.08mm)	82nd Wettest	Wettest since: 1969	1915
May–Sep 1970 5-Month	13.22" (335.79mm)	13.72" (348.49mm)	-0.50" (-12.70mm)	41st Driest	Driest since: 1966	1956
	13.22" (335.79mm)	13.72" (348.49mm)	-0.50" (-12.70mm)	88th Wettest	Wettest since: 1969	1915
	Ties: 2022
Apr–Sep 1970 6-Month	16.00" (406.40mm)	16.24" (412.50mm)	-0.24" (-6.10mm)	51st Driest	Driest since: 1966	1956
Apr–Sep 1970 6-Month	16.00" (406.40mm)	16.24" (412.50mm)	-0.24" (-6.10mm)	78th Wettest	Wettest since: 1969	1915
Mar–Sep 1970 7-Month	18.68" (474.47mm)	18.75" (476.25mm)	-0.07" (-1.78mm)	55th Driest	Driest since: 1969	1956
	18.68" (474.47mm)	18.75" (476.25mm)	-0.07" (-1.78mm)	74th Wettest	Wettest since: 1968	1973
	Ties: 1999
Feb–Sep 1970 8-Month	20.31" (515.87mm)	20.88" (530.35mm)	-0.57" (-14.48mm)	40th Driest	Driest since: 1966	1930
Feb–Sep 1970 8-Month	20.31" (515.87mm)	20.88" (530.35mm)	-0.57" (-14.48mm)	89th Wettest	Wettest since: 1969	2019
Jan–Sep 1970 9-Month	22.40" (568.96mm)	23.20" (589.28mm)	-0.80" (-20.32mm)	36th Driest	Driest since: 1966	1934
	22.40" (568.96mm)	23.20" (589.28mm)	-0.80" (-20.32mm)	93rd Wettest	Wettest since: 1969	2019
	Ties: 1960
Dec 1969–Sep 1970 10-Month	25.34" (643.64mm)	25.54" (648.72mm)	-0.20" (-5.08mm)	55th Driest	Driest since: 1967	1931
Dec 1969–Sep 1970 10-Month	25.34" (643.64mm)	25.54" (648.72mm)	-0.20" (-5.08mm)	73rd Wettest	Wettest since: 1969	2019
Nov 1969–Sep 1970 11-Month	26.93" (684.02mm)	27.77" (705.36mm)	-0.84" (-21.34mm)	40th Driest	Driest since: 1966	1934
Nov 1969–Sep 1970 11-Month	26.93" (684.02mm)	27.77" (705.36mm)	-0.84" (-21.34mm)	88th Wettest	Wettest since: 1969	2019
Oct 1969–Sep 1970 12-Month	29.63" (752.60mm)	29.94" (760.48mm)	-0.31" (-7.88mm)	51st Driest	Driest since: 1967	1934
Oct 1969–Sep 1970 12-Month	29.63" (752.60mm)	29.94" (760.48mm)	-0.31" (-7.88mm)	77th Wettest	Wettest since: 1969	2019
Apr 1969–Sep 1970 18-Month	45.90" (1,165.86mm)	46.20" (1,173.48mm)	-0.30" (-7.62mm)	51st Driest	Driest since: 1967	1931
Apr 1969–Sep 1970 18-Month	45.90" (1,165.86mm)	46.20" (1,173.48mm)	-0.30" (-7.62mm)	77th Wettest	Wettest since: 1969	2019
Oct 1968–Sep 1970 24-Month	60.74" (1,542.80mm)	59.92" (1,521.97mm)	0.82" (20.83mm)	72nd Driest	Driest since: 1968	1918
Oct 1968–Sep 1970 24-Month	60.74" (1,542.80mm)	59.92" (1,521.97mm)	0.82" (20.83mm)	55th Wettest	Wettest since: 1969	2020
Oct 1967–Sep 1970 36-Month	90.43" (2,296.92mm)	89.87" (2,282.70mm)	0.56" (14.22mm)	66th Driest	Driest since: 1969	1956
Oct 1967–Sep 1970 36-Month	90.43" (2,296.92mm)	89.87" (2,282.70mm)	0.56" (14.22mm)	60th Wettest	Wettest since: 1960	2019
Oct 1966–Sep 1970 48-Month	119.24" (3,028.70mm)	119.78" (3,042.41mm)	-0.54" (-13.71mm)	54th Driest	Driest since: 1969	1956
Oct 1966–Sep 1970 48-Month	119.24" (3,028.70mm)	119.78" (3,042.41mm)	-0.54" (-13.71mm)	71st Wettest	Wettest since: 1961	2019
Oct 1965–Sep 1970 60-Month	146.09" (3,710.69mm)	149.66" (3,801.36mm)	-3.57" (-90.67mm)	29th Driest	Driest since: 1968	1956
Oct 1965–Sep 1970 60-Month	146.09" (3,710.69mm)	149.66" (3,801.36mm)	-3.57" (-90.67mm)	95th Wettest	Wettest since: 1969	2020

Citing This Page

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