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 1918

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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 1918 1-Month	2.44" (61.98mm)	2.49" (63.25mm)	-0.05" (-1.27mm)	53rd Driest	Driest since: 1917	1956
	2.44" (61.98mm)	2.49" (63.25mm)	-0.05" (-1.27mm)	76th Wettest	Wettest since: 1915	1986
	Ties: 1920, 1966, 1978, 2020
Aug–Sep 1918 2-Month	4.91" (124.71mm)	5.11" (129.79mm)	-0.20" (-5.08mm)	45th Driest	Driest since: 1917	1956
Aug–Sep 1918 2-Month	4.91" (124.71mm)	5.11" (129.79mm)	-0.20" (-5.08mm)	84th Wettest	Wettest since: 1915	1977
Jul–Sep 1918 3-Month	7.24" (183.90mm)	7.88" (200.15mm)	-0.64" (-16.25mm)	24th Driest	Driest since: 1917	1930
Jul–Sep 1918 3-Month	7.24" (183.90mm)	7.88" (200.15mm)	-0.64" (-16.25mm)	105th Wettest	Wettest since: 1916	1915
Jun–Sep 1918 4-Month	9.49" (241.05mm)	10.81" (274.57mm)	-1.32" (-33.52mm)	8th Driest	Driest since: 1910	1930
	9.49" (241.05mm)	10.81" (274.57mm)	-1.32" (-33.52mm)	121st Wettest	Wettest since: 1917	1915
	Ties: 1910
May–Sep 1918 5-Month	12.08" (306.83mm)	13.72" (348.49mm)	-1.64" (-41.66mm)	11th Driest	Driest since: 1910	1956
	12.08" (306.83mm)	13.72" (348.49mm)	-1.64" (-41.66mm)	118th Wettest	Wettest since: 1917	1915
	Ties: 1910
Apr–Sep 1918 6-Month	14.90" (378.46mm)	16.24" (412.50mm)	-1.34" (-34.04mm)	18th Driest	Driest since: 1917	1956
Apr–Sep 1918 6-Month	14.90" (378.46mm)	16.24" (412.50mm)	-1.34" (-34.04mm)	111th Wettest	Wettest since: 1916	1915
Mar–Sep 1918 7-Month	16.75" (425.45mm)	18.75" (476.25mm)	-2.00" (-50.80mm)	12th Driest	Driest since: 1910	1956
Mar–Sep 1918 7-Month	16.75" (425.45mm)	18.75" (476.25mm)	-2.00" (-50.80mm)	117th Wettest	Wettest since: 1917	1973
Feb–Sep 1918 8-Month	18.47" (469.14mm)	20.88" (530.35mm)	-2.41" (-61.21mm)	11th Driest	Driest since: 1910	1930
Feb–Sep 1918 8-Month	18.47" (469.14mm)	20.88" (530.35mm)	-2.41" (-61.21mm)	118th Wettest	Wettest since: 1917	2019
Jan–Sep 1918 9-Month	20.88" (530.35mm)	23.20" (589.28mm)	-2.32" (-58.93mm)	10th Driest	Driest since: 1910	1934
Jan–Sep 1918 9-Month	20.88" (530.35mm)	23.20" (589.28mm)	-2.32" (-58.93mm)	119th Wettest	Wettest since: 1917	2019
Dec 1917–Sep 1918 10-Month	22.54" (572.52mm)	25.54" (648.72mm)	-3.00" (-76.20mm)	8th Driest	Driest since: 1910	1931
Dec 1917–Sep 1918 10-Month	22.54" (572.52mm)	25.54" (648.72mm)	-3.00" (-76.20mm)	120th Wettest	Wettest since: 1917	2019
Nov 1917–Sep 1918 11-Month	23.49" (596.65mm)	27.77" (705.36mm)	-4.28" (-108.71mm)	3rd Driest	Driest to Date	1934
Nov 1917–Sep 1918 11-Month	23.49" (596.65mm)	27.77" (705.36mm)	-4.28" (-108.71mm)	125th Wettest	Wettest since: 1917	2019
Oct 1917–Sep 1918 12-Month	24.87" (631.70mm)	29.94" (760.48mm)	-5.07" (-128.78mm)	2nd Driest	Driest to Date	1934
Oct 1917–Sep 1918 12-Month	24.87" (631.70mm)	29.94" (760.48mm)	-5.07" (-128.78mm)	126th Wettest	Wettest since: 1917	2019
Apr 1917–Sep 1918 18-Month	39.75" (1,009.65mm)	46.20" (1,173.48mm)	-6.45" (-163.83mm)	2nd Driest	Driest to Date	1931
Apr 1917–Sep 1918 18-Month	39.75" (1,009.65mm)	46.20" (1,173.48mm)	-6.45" (-163.83mm)	126th Wettest	Wettest since: 1917	2019
Oct 1916–Sep 1918 24-Month	52.02" (1,321.31mm)	59.92" (1,521.97mm)	-7.90" (-200.66mm)	1st Driest	Driest to Date	1918
Oct 1916–Sep 1918 24-Month	52.02" (1,321.31mm)	59.92" (1,521.97mm)	-7.90" (-200.66mm)	126th Wettest	Wettest since: 1917	2020
Oct 1915–Sep 1918 36-Month	82.23" (2,088.64mm)	89.87" (2,282.70mm)	-7.64" (-194.06mm)	5th Driest	Driest to Date	1956
Oct 1915–Sep 1918 36-Month	82.23" (2,088.64mm)	89.87" (2,282.70mm)	-7.64" (-194.06mm)	121st Wettest	Wettest since: 1917	2019
Oct 1914–Sep 1918 48-Month	114.94" (2,919.48mm)	119.78" (3,042.41mm)	-4.84" (-122.93mm)	20th Driest	Driest since: 1913	1956
Oct 1914–Sep 1918 48-Month	114.94" (2,919.48mm)	119.78" (3,042.41mm)	-4.84" (-122.93mm)	105th Wettest	Wettest since: 1917	2019
Oct 1913–Sep 1918 60-Month	144.37" (3,667.00mm)	149.66" (3,801.36mm)	-5.29" (-134.36mm)	20th Driest	Driest since: 1914	1956
Oct 1913–Sep 1918 60-Month	144.37" (3,667.00mm)	149.66" (3,801.36mm)	-5.29" (-134.36mm)	104th Wettest	Wettest since: 1917	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published June 2023, retrieved on June 10, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings