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Divisional Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska or Hawaii. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Idaho, Climate Division 2

December 1985 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1985 1-Month	-2.68	-0.15	-2.53	10th Driest	Driest since: 1976	1976
	-2.68	-0.15	-2.53	121st Wettest	Wettest since: 1984	1964
	Ties: 1914
Nov–Dec 1985 2-Month	-0.84	0.02	-0.86	44th Driest	Driest since: 1979	1936, 1976
Nov–Dec 1985 2-Month	-0.84	0.02	-0.86	87th Wettest	Wettest since: 1984	1927
Oct–Dec 1985 3-Month	-0.30	-0.01	-0.29	56th Driest	Driest since: 1980	1936
Oct–Dec 1985 3-Month	-0.30	-0.01	-0.29	75th Wettest	Wettest since: 1984	1927
Sep–Dec 1985 4-Month	0.80	-0.01	0.81	97th Driest	Driest since: 1983	1936
	0.80	-0.01	0.81	34th Wettest	Wettest since: 1984	1927
	Ties: 1971
Aug–Dec 1985 5-Month	0.96	-0.01	0.97	110th Driest	Driest since: 1984	1936
Aug–Dec 1985 5-Month	0.96	-0.01	0.97	21st Wettest	Wettest since: 1977	1927
Jul–Dec 1985 6-Month	0.61	0.01	0.60	98th Driest	Driest since: 1980	1936
Jul–Dec 1985 6-Month	0.61	0.01	0.60	33rd Wettest	Wettest since: 1984	1927
Jun–Dec 1985 7-Month	0.39	0.01	0.38	90th Driest	Driest since: 1979	1936
	0.39	0.01	0.38	41st Wettest	Wettest since: 1984	1995
	Ties: 1905
May–Dec 1985 8-Month	0.36	0.02	0.34	86th Driest	Driest since: 1982	1936
May–Dec 1985 8-Month	0.36	0.02	0.34	45th Wettest	Wettest since: 1984	1927
Apr–Dec 1985 9-Month	0.17	0.02	0.15	77th Driest	Driest since: 1979	1936
Apr–Dec 1985 9-Month	0.17	0.02	0.15	54th Wettest	Wettest since: 1984	1927
Mar–Dec 1985 10-Month	0.04	0.01	0.03	74th Driest	Driest since: 1979	1936
Mar–Dec 1985 10-Month	0.04	0.01	0.03	57th Wettest	Wettest since: 1984	1948
Feb–Dec 1985 11-Month	-0.07	0.01	-0.08	67th Driest	Driest since: 1979	1936
	-0.07	0.01	-0.08	64th Wettest	Wettest since: 1984	1927
	Ties: 1900
Jan–Dec 1985 12-Month	-0.36	0.02	-0.38	41st Driest	Driest since: 1979	1987
Jan–Dec 1985 12-Month	-0.36	0.02	-0.38	90th Wettest	Wettest since: 1984	1927
Jul 1984–Dec 1985 18-Month	0.01	0.02	-0.01	71st Driest	Driest since: 1980	1936
Jul 1984–Dec 1985 18-Month	0.01	0.02	-0.01	59th Wettest	Wettest since: 1984	1927
Jan 1984–Dec 1985 24-Month	0.21	0.02	0.19	84th Driest	Driest since: 1980	1936
Jan 1984–Dec 1985 24-Month	0.21	0.02	0.19	46th Wettest	Wettest since: 1984	1996
Jan 1983–Dec 1985 36-Month	0.30	0.02	0.28	98th Driest	Driest since: 1981	1936
	0.30	0.02	0.28	31st Wettest	Wettest since: 1984	1997
	Ties: 1904
Jan 1982–Dec 1985 48-Month	0.38	0.02	0.36	110th Driest	Driest since: 1982	1937
Jan 1982–Dec 1985 48-Month	0.38	0.02	0.36	18th Wettest	Wettest since: 1984	1998
Jan 1981–Dec 1985 60-Month	0.39	0.02	0.37	114th Driest	Driest since: 1983	1938
Jan 1981–Dec 1985 60-Month	0.39	0.02	0.37	13th Wettest	Wettest since: 1984	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Rankings, published March 2025, retrieved on March 31, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/rankings

Climate at a Glance Divisional Rankings

Divisional Rankings

Idaho, Climate Division 2

December 1985 Palmer Z-Index Rankings

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