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, May 1955

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 1955 1-Month	2.92" (74.17mm)	2.91" (73.91mm)	0.01" (0.26mm)	62nd Driest	Driest since: 1954	1934
	2.92" (74.17mm)	2.91" (73.91mm)	0.01" (0.26mm)	67th Wettest	Wettest since: 1953	2019
	Ties: 1971
Apr–May 1955 2-Month	5.41" (137.41mm)	5.43" (137.92mm)	-0.02" (-0.51mm)	68th Driest	Driest since: 1954	1934
	5.41" (137.41mm)	5.43" (137.92mm)	-0.02" (-0.51mm)	61st Wettest	Wettest since: 1953	1957
	Ties: 1918, 1946
Mar–May 1955 3-Month	7.39" (187.71mm)	7.94" (201.68mm)	-0.55" (-13.97mm)	34th Driest	Driest since: 1954	1925
	7.39" (187.71mm)	7.94" (201.68mm)	-0.55" (-13.97mm)	95th Wettest	Wettest since: 1953	1957, 1991
	Ties: 1965
Feb–May 1955 4-Month	9.61" (244.09mm)	10.07" (255.78mm)	-0.46" (-11.69mm)	44th Driest	Driest since: 1954	1925
	9.61" (244.09mm)	10.07" (255.78mm)	-0.46" (-11.69mm)	85th Wettest	Wettest since: 1953	2019
	Ties: 1901, 1917
Jan–May 1955 5-Month	11.30" (287.02mm)	12.39" (314.71mm)	-1.09" (-27.69mm)	21st Driest	Driest since: 1954	1934
	11.30" (287.02mm)	12.39" (314.71mm)	-1.09" (-27.69mm)	108th Wettest	Wettest since: 1953	2019
	Ties: 1930
Dec 1954–May 1955 6-Month	13.30" (337.82mm)	14.73" (374.14mm)	-1.43" (-36.32mm)	18th Driest	Driest since: 1934	1931
Dec 1954–May 1955 6-Month	13.30" (337.82mm)	14.73" (374.14mm)	-1.43" (-36.32mm)	110th Wettest	Wettest since: 1954	2019
Nov 1954–May 1955 7-Month	14.84" (376.94mm)	16.96" (430.78mm)	-2.12" (-53.84mm)	9th Driest	Driest since: 1934	1934
Nov 1954–May 1955 7-Month	14.84" (376.94mm)	16.96" (430.78mm)	-2.12" (-53.84mm)	119th Wettest	Wettest since: 1954	1983
Oct 1954–May 1955 8-Month	17.19" (436.63mm)	19.13" (485.90mm)	-1.94" (-49.27mm)	18th Driest	Driest since: 1954	1934
Oct 1954–May 1955 8-Month	17.19" (436.63mm)	19.13" (485.90mm)	-1.94" (-49.27mm)	110th Wettest	Wettest since: 1953	2019
Sep 1954–May 1955 9-Month	19.14" (486.16mm)	21.62" (549.15mm)	-2.48" (-62.99mm)	12th Driest	Driest since: 1954	1934
Sep 1954–May 1955 9-Month	19.14" (486.16mm)	21.62" (549.15mm)	-2.48" (-62.99mm)	116th Wettest	Wettest since: 1953	2019
Aug 1954–May 1955 10-Month	21.66" (550.16mm)	24.25" (615.95mm)	-2.59" (-65.79mm)	13th Driest	Driest since: 1954	1918
	21.66" (550.16mm)	24.25" (615.95mm)	-2.59" (-65.79mm)	115th Wettest	Wettest since: 1953	2019
	Ties: 1981
Jul 1954–May 1955 11-Month	23.67" (601.22mm)	27.03" (686.56mm)	-3.36" (-85.34mm)	10th Driest	Driest since: 1954	1931
Jul 1954–May 1955 11-Month	23.67" (601.22mm)	27.03" (686.56mm)	-3.36" (-85.34mm)	118th Wettest	Wettest since: 1953	2019
Jun 1954–May 1955 12-Month	26.17" (664.72mm)	29.95" (760.73mm)	-3.78" (-96.01mm)	9th Driest	Driest since: 1954	1934
Jun 1954–May 1955 12-Month	26.17" (664.72mm)	29.95" (760.73mm)	-3.78" (-96.01mm)	119th Wettest	Wettest since: 1953	2019
Dec 1953–May 1955 18-Month	39.95" (1,014.73mm)	44.70" (1,135.38mm)	-4.75" (-120.65mm)	8th Driest	Driest since: 1934	1931
Dec 1953–May 1955 18-Month	39.95" (1,014.73mm)	44.70" (1,135.38mm)	-4.75" (-120.65mm)	119th Wettest	Wettest since: 1954	2019
Jun 1953–May 1955 24-Month	52.23" (1,326.64mm)	59.92" (1,521.97mm)	-7.69" (-195.33mm)	2nd Driest	Driest since: 1931	1931
Jun 1953–May 1955 24-Month	52.23" (1,326.64mm)	59.92" (1,521.97mm)	-7.69" (-195.33mm)	125th Wettest	Wettest since: 1954	2020
Jun 1952–May 1955 36-Month	79.64" (2,022.86mm)	89.88" (2,282.95mm)	-10.24" (-260.09mm)	1st Driest	Driest since: 1955	1955
Jun 1952–May 1955 36-Month	79.64" (2,022.86mm)	89.88" (2,282.95mm)	-10.24" (-260.09mm)	125th Wettest	Wettest since: 1954	2019
Jun 1951–May 1955 48-Month	111.42" (2,830.07mm)	119.78" (3,042.41mm)	-8.36" (-212.34mm)	5th Driest	Driest since: 1937	1956
Jun 1951–May 1955 48-Month	111.42" (2,830.07mm)	119.78" (3,042.41mm)	-8.36" (-212.34mm)	120th Wettest	Wettest since: 1954	2019
Jun 1950–May 1955 60-Month	141.18" (3,585.97mm)	149.64" (3,800.86mm)	-8.46" (-214.89mm)	7th Driest	Driest since: 1937	1957
Jun 1950–May 1955 60-Month	141.18" (3,585.97mm)	149.64" (3,800.86mm)	-8.46" (-214.89mm)	117th Wettest	Wettest since: 1954	2020

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