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, December 2018

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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
December 2018 1-Month	3.25" (82.55mm)	2.35" (59.69mm)	0.90" (22.86mm)	122nd Driest	Driest since: 2017	1930
December 2018 1-Month	3.25" (82.55mm)	2.35" (59.69mm)	0.90" (22.86mm)	7th Wettest	Wettest since: 2015	2015
Nov–Dec 2018 2-Month	5.96" (151.38mm)	4.58" (116.33mm)	1.38" (35.05mm)	120th Driest	Driest since: 2017	1976
Nov–Dec 2018 2-Month	5.96" (151.38mm)	4.58" (116.33mm)	1.38" (35.05mm)	9th Wettest	Wettest since: 2015	2015
Oct–Dec 2018 3-Month	9.39" (238.51mm)	6.74" (171.20mm)	2.65" (67.31mm)	126th Driest	Driest since: 2017	1917
Oct–Dec 2018 3-Month	9.39" (238.51mm)	6.74" (171.20mm)	2.65" (67.31mm)	3rd Wettest	Wettest since: 2015	2015
Sep–Dec 2018 4-Month	12.96" (329.18mm)	9.23" (234.44mm)	3.73" (94.74mm)	128th Driest	Driest since: 2017	1939
Sep–Dec 2018 4-Month	12.96" (329.18mm)	9.23" (234.44mm)	3.73" (94.74mm)	1st Wettest	Wettest to Date	2018
Aug–Dec 2018 5-Month	15.94" (404.88mm)	11.85" (300.99mm)	4.09" (103.89mm)	128th Driest	Driest since: 2017	1917
Aug–Dec 2018 5-Month	15.94" (404.88mm)	11.85" (300.99mm)	4.09" (103.89mm)	1st Wettest	Wettest to Date	2018
Jul–Dec 2018 6-Month	18.80" (477.52mm)	14.62" (371.35mm)	4.18" (106.17mm)	128th Driest	Driest since: 2017	1917
Jul–Dec 2018 6-Month	18.80" (477.52mm)	14.62" (371.35mm)	4.18" (106.17mm)	1st Wettest	Wettest to Date	2018
Jun–Dec 2018 7-Month	21.95" (557.53mm)	17.55" (445.77mm)	4.40" (111.76mm)	128th Driest	Driest since: 2017	1917
Jun–Dec 2018 7-Month	21.95" (557.53mm)	17.55" (445.77mm)	4.40" (111.76mm)	1st Wettest	Wettest to Date	2018
May–Dec 2018 8-Month	24.97" (634.24mm)	20.46" (519.68mm)	4.51" (114.56mm)	127th Driest	Driest since: 2017	1917
May–Dec 2018 8-Month	24.97" (634.24mm)	20.46" (519.68mm)	4.51" (114.56mm)	2nd Wettest	Wettest since: 2015	2015
Apr–Dec 2018 9-Month	27.43" (696.72mm)	22.98" (583.69mm)	4.45" (113.03mm)	127th Driest	Driest since: 2017	1956
Apr–Dec 2018 9-Month	27.43" (696.72mm)	22.98" (583.69mm)	4.45" (113.03mm)	2nd Wettest	Wettest since: 2015	2015
Mar–Dec 2018 10-Month	29.91" (759.71mm)	25.49" (647.45mm)	4.42" (112.26mm)	125th Driest	Driest since: 2017	1956
Mar–Dec 2018 10-Month	29.91" (759.71mm)	25.49" (647.45mm)	4.42" (112.26mm)	4th Wettest	Wettest since: 2015	2015
Feb–Dec 2018 11-Month	32.80" (833.12mm)	27.62" (701.55mm)	5.18" (131.57mm)	128th Driest	Driest since: 2017	1910
Feb–Dec 2018 11-Month	32.80" (833.12mm)	27.62" (701.55mm)	5.18" (131.57mm)	1st Wettest	Wettest to Date	2018
Jan–Dec 2018 12-Month	34.65" (880.11mm)	29.94" (760.48mm)	4.71" (119.63mm)	125th Driest	Driest since: 2017	1910
Jan–Dec 2018 12-Month	34.65" (880.11mm)	29.94" (760.48mm)	4.71" (119.63mm)	4th Wettest	Wettest since: 1983	1973
Jul 2017–Dec 2018 18-Month	48.95" (1,243.33mm)	44.58" (1,132.33mm)	4.37" (111.00mm)	118th Driest	Driest since: 2017	1954
Jul 2017–Dec 2018 18-Month	48.95" (1,243.33mm)	44.58" (1,132.33mm)	4.37" (111.00mm)	10th Wettest	Wettest since: 2016	2019
Jan 2017–Dec 2018 24-Month	66.96" (1,700.78mm)	59.90" (1,521.46mm)	7.06" (179.32mm)	125th Driest	Driest since: 2017	1931
Jan 2017–Dec 2018 24-Month	66.96" (1,700.78mm)	59.90" (1,521.46mm)	7.06" (179.32mm)	3rd Wettest	Wettest since: 1983	2019
Jan 2016–Dec 2018 36-Month	98.38" (2,498.85mm)	89.86" (2,282.44mm)	8.52" (216.41mm)	120th Driest	Driest since: 2017	1956
Jan 2016–Dec 2018 36-Month	98.38" (2,498.85mm)	89.86" (2,282.44mm)	8.52" (216.41mm)	7th Wettest	Wettest since: 1998	2019
Jan 2015–Dec 2018 48-Month	132.97" (3,377.44mm)	119.78" (3,042.41mm)	13.19" (335.03mm)	124th Driest	Driest since: 2017	1956
Jan 2015–Dec 2018 48-Month	132.97" (3,377.44mm)	119.78" (3,042.41mm)	13.19" (335.03mm)	2nd Wettest	Wettest to Date	2019
Jan 2014–Dec 2018 60-Month	163.82" (4,161.03mm)	149.68" (3,801.87mm)	14.14" (359.16mm)	123rd Driest	Driest since: 2017	1956
Jan 2014–Dec 2018 60-Month	163.82" (4,161.03mm)	149.68" (3,801.87mm)	14.14" (359.16mm)	2nd Wettest	Wettest to Date	2019

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