Regional Rankings

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Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Ohio Valley Climate Region

Precipitation Rankings, December 1999

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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 1999 1-Month	3.17" (80.52mm)	3.11" (78.99mm)	0.06" (1.53mm)	71st Driest	Driest since: 1998	1958
December 1999 1-Month	3.17" (80.52mm)	3.11" (78.99mm)	0.06" (1.53mm)	58th Wettest	Wettest since: 1996	1990
Nov–Dec 1999 2-Month	4.98" (126.49mm)	6.23" (158.24mm)	-1.25" (-31.75mm)	31st Driest	Driest since: 1989	1976
Nov–Dec 1999 2-Month	4.98" (126.49mm)	6.23" (158.24mm)	-1.25" (-31.75mm)	98th Wettest	Wettest since: 1998	2015
Oct–Dec 1999 3-Month	7.14" (181.36mm)	9.13" (231.90mm)	-1.99" (-50.54mm)	25th Driest	Driest since: 1989	1963
Oct–Dec 1999 3-Month	7.14" (181.36mm)	9.13" (231.90mm)	-1.99" (-50.54mm)	104th Wettest	Wettest since: 1998	1990
Sep–Dec 1999 4-Month	9.12" (231.65mm)	12.60" (320.04mm)	-3.48" (-88.39mm)	12th Driest	Driest since: 1976	1963
Sep–Dec 1999 4-Month	9.12" (231.65mm)	12.60" (320.04mm)	-3.48" (-88.39mm)	117th Wettest	Wettest since: 1998	1926
Aug–Dec 1999 5-Month	11.51" (292.35mm)	16.27" (413.26mm)	-4.76" (-120.91mm)	7th Driest	Driest since: 1976	1953
	11.51" (292.35mm)	16.27" (413.26mm)	-4.76" (-120.91mm)	122nd Wettest	Wettest since: 1998	1926
	Ties: 1930, 1976
Jul–Dec 1999 6-Month	14.34" (364.24mm)	20.27" (514.86mm)	-5.93" (-150.62mm)	6th Driest	Driest since: 1963	1953
Jul–Dec 1999 6-Month	14.34" (364.24mm)	20.27" (514.86mm)	-5.93" (-150.62mm)	123rd Wettest	Wettest since: 1998	1926
Jun–Dec 1999 7-Month	18.63" (473.20mm)	24.52" (622.81mm)	-5.89" (-149.61mm)	5th Driest	Driest since: 1963	1953
Jun–Dec 1999 7-Month	18.63" (473.20mm)	24.52" (622.81mm)	-5.89" (-149.61mm)	124th Wettest	Wettest since: 1998	2015
May–Dec 1999 8-Month	22.17" (563.12mm)	28.79" (731.27mm)	-6.62" (-168.15mm)	4th Driest	Driest since: 1963	1953
May–Dec 1999 8-Month	22.17" (563.12mm)	28.79" (731.27mm)	-6.62" (-168.15mm)	125th Wettest	Wettest since: 1998	2015
Apr–Dec 1999 9-Month	26.87" (682.50mm)	32.70" (830.58mm)	-5.83" (-148.08mm)	8th Driest	Driest since: 1976	1930
Apr–Dec 1999 9-Month	26.87" (682.50mm)	32.70" (830.58mm)	-5.83" (-148.08mm)	121st Wettest	Wettest since: 1998	2015
Mar–Dec 1999 10-Month	29.67" (753.62mm)	36.51" (927.35mm)	-6.84" (-173.73mm)	4th Driest	Driest since: 1963	1930
Mar–Dec 1999 10-Month	29.67" (753.62mm)	36.51" (927.35mm)	-6.84" (-173.73mm)	125th Wettest	Wettest since: 1998	2011
Feb–Dec 1999 11-Month	32.38" (822.45mm)	39.19" (995.43mm)	-6.81" (-172.98mm)	5th Driest	Driest since: 1963	1930
Feb–Dec 1999 11-Month	32.38" (822.45mm)	39.19" (995.43mm)	-6.81" (-172.98mm)	124th Wettest	Wettest since: 1998	2011
Jan–Dec 1999 12-Month	37.51" (952.75mm)	42.23" (1,072.64mm)	-4.72" (-119.89mm)	19th Driest	Driest since: 1988	1930
Jan–Dec 1999 12-Month	37.51" (952.75mm)	42.23" (1,072.64mm)	-4.72" (-119.89mm)	110th Wettest	Wettest since: 1998	2019
Jul 1998–Dec 1999 18-Month	56.43" (1,433.32mm)	62.51" (1,587.75mm)	-6.08" (-154.43mm)	20th Driest	Driest since: 1964	1953
Jul 1998–Dec 1999 18-Month	56.43" (1,433.32mm)	62.51" (1,587.75mm)	-6.08" (-154.43mm)	108th Wettest	Wettest since: 1998	2019
Jan 1998–Dec 1999 24-Month	85.18" (2,163.57mm)	84.45" (2,145.03mm)	0.73" (18.54mm)	62nd Driest	Driest since: 1992	1953
Jan 1998–Dec 1999 24-Month	85.18" (2,163.57mm)	84.45" (2,145.03mm)	0.73" (18.54mm)	66th Wettest	Wettest since: 1998	2019
Jan 1997–Dec 1999 36-Month	127.48" (3,237.99mm)	126.69" (3,217.93mm)	0.79" (20.06mm)	60th Driest	Driest since: 1989	1954
	127.48" (3,237.99mm)	126.69" (3,217.93mm)	0.79" (20.06mm)	67th Wettest	Wettest since: 1998	2020
	Ties: 1917
Jan 1996–Dec 1999 48-Month	176.28" (4,477.51mm)	168.95" (4,291.33mm)	7.33" (186.18mm)	88th Driest	Driest since: 1994	1955
Jan 1996–Dec 1999 48-Month	176.28" (4,477.51mm)	168.95" (4,291.33mm)	7.33" (186.18mm)	38th Wettest	Wettest since: 1998	2021
Jan 1995–Dec 1999 60-Month	219.15" (5,566.41mm)	211.20" (5,364.48mm)	7.95" (201.93mm)	87th Driest	Driest since: 1995	1956
Jan 1995–Dec 1999 60-Month	219.15" (5,566.41mm)	211.20" (5,364.48mm)	7.95" (201.93mm)	38th Wettest	Wettest since: 1998	2021

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published May 2023, retrieved on May 29, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings