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, October 1975

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
October 1975 1-Month	2.30" (58.42mm)	2.16" (54.86mm)	0.14" (3.56mm)	72nd Driest	Driest since: 1974	1952
	2.30" (58.42mm)	2.16" (54.86mm)	0.14" (3.56mm)	57th Wettest	Wettest since: 1973	2009
	Ties: 1951
Sep–Oct 1975 2-Month	4.96" (125.98mm)	4.65" (118.11mm)	0.31" (7.87mm)	84th Driest	Driest since: 1974	1952
Sep–Oct 1975 2-Month	4.96" (125.98mm)	4.65" (118.11mm)	0.31" (7.87mm)	45th Wettest	Wettest since: 1973	2018
Aug–Oct 1975 3-Month	7.79" (197.87mm)	7.27" (184.66mm)	0.52" (13.21mm)	87th Driest	Driest since: 1969	1952
Aug–Oct 1975 3-Month	7.79" (197.87mm)	7.27" (184.66mm)	0.52" (13.21mm)	42nd Wettest	Wettest since: 1974	2018
Jul–Oct 1975 4-Month	10.76" (273.30mm)	10.05" (255.27mm)	0.71" (18.03mm)	94th Driest	Driest since: 1974	1952
	10.76" (273.30mm)	10.05" (255.27mm)	0.71" (18.03mm)	35th Wettest	Wettest since: 1973	1941
	Ties: 1998
Jun–Oct 1975 5-Month	14.07" (357.38mm)	12.97" (329.44mm)	1.10" (27.94mm)	101st Driest	Driest since: 1974	1952
	14.07" (357.38mm)	12.97" (329.44mm)	1.10" (27.94mm)	28th Wettest	Wettest since: 1972	1941
	Ties: 2010
May–Oct 1975 6-Month	17.35" (440.69mm)	15.88" (403.35mm)	1.47" (37.34mm)	105th Driest	Driest since: 1974	1952
May–Oct 1975 6-Month	17.35" (440.69mm)	15.88" (403.35mm)	1.47" (37.34mm)	24th Wettest	Wettest since: 1959	1941
Apr–Oct 1975 7-Month	20.02" (508.51mm)	18.40" (467.36mm)	1.62" (41.15mm)	104th Driest	Driest since: 1974	1952
Apr–Oct 1975 7-Month	20.02" (508.51mm)	18.40" (467.36mm)	1.62" (41.15mm)	25th Wettest	Wettest since: 1973	1941
Mar–Oct 1975 8-Month	23.42" (594.87mm)	20.91" (531.11mm)	2.51" (63.76mm)	117th Driest	Driest since: 1974	1956
Mar–Oct 1975 8-Month	23.42" (594.87mm)	20.91" (531.11mm)	2.51" (63.76mm)	12th Wettest	Wettest since: 1973	2019
Feb–Oct 1975 9-Month	26.03" (661.16mm)	23.04" (585.22mm)	2.99" (75.94mm)	122nd Driest	Driest since: 1974	1934
Feb–Oct 1975 9-Month	26.03" (661.16mm)	23.04" (585.22mm)	2.99" (75.94mm)	7th Wettest	Wettest since: 1973	2019
Jan–Oct 1975 10-Month	28.64" (727.46mm)	25.36" (644.14mm)	3.28" (83.32mm)	123rd Driest	Driest since: 1974	1934
Jan–Oct 1975 10-Month	28.64" (727.46mm)	25.36" (644.14mm)	3.28" (83.32mm)	6th Wettest	Wettest since: 1973	2019
Dec 1974–Oct 1975 11-Month	31.06" (788.92mm)	27.70" (703.58mm)	3.36" (85.34mm)	119th Driest	Driest since: 1974	1931
Dec 1974–Oct 1975 11-Month	31.06" (788.92mm)	27.70" (703.58mm)	3.36" (85.34mm)	9th Wettest	Wettest since: 1973	2019
Nov 1974–Oct 1975 12-Month	33.24" (844.30mm)	29.93" (760.22mm)	3.31" (84.08mm)	116th Driest	Driest since: 1974	1934
Nov 1974–Oct 1975 12-Month	33.24" (844.30mm)	29.93" (760.22mm)	3.31" (84.08mm)	12th Wettest	Wettest since: 1973	2019
May 1974–Oct 1975 18-Month	49.25" (1,250.95mm)	45.83" (1,164.08mm)	3.42" (86.87mm)	109th Driest	Driest since: 1974	1931
	49.25" (1,250.95mm)	45.83" (1,164.08mm)	3.42" (86.87mm)	19th Wettest	Wettest since: 1973	2019
	Ties: 1907
Nov 1973–Oct 1975 24-Month	65.52" (1,664.21mm)	59.90" (1,521.46mm)	5.62" (142.75mm)	116th Driest	Driest since: 1972	1931
Nov 1973–Oct 1975 24-Month	65.52" (1,664.21mm)	59.90" (1,521.46mm)	5.62" (142.75mm)	11th Wettest	Wettest since: 1974	2019
Nov 1972–Oct 1975 36-Month	100.29" (2,547.37mm)	89.86" (2,282.44mm)	10.43" (264.93mm)	124th Driest	Driest since: 1974	1956
Nov 1972–Oct 1975 36-Month	100.29" (2,547.37mm)	89.86" (2,282.44mm)	10.43" (264.93mm)	2nd Wettest	Wettest to Date	2019
Nov 1971–Oct 1975 48-Month	131.15" (3,331.21mm)	119.78" (3,042.41mm)	11.37" (288.80mm)	120th Driest	Driest since: 1974	1956
Nov 1971–Oct 1975 48-Month	131.15" (3,331.21mm)	119.78" (3,042.41mm)	11.37" (288.80mm)	5th Wettest	Wettest to Date	2019
Nov 1970–Oct 1975 60-Month	160.67" (4,081.02mm)	149.66" (3,801.36mm)	11.01" (279.66mm)	114th Driest	Driest since: 1974	1934
Nov 1970–Oct 1975 60-Month	160.67" (4,081.02mm)	149.66" (3,801.36mm)	11.01" (279.66mm)	10th Wettest	Wettest to Date	2019

Citing This Page

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