Climate at a Glance | Divisional Rankings | National Centers for Environmental Information (NCEI)

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 1966 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1966 1-Month	0.67	-0.15	0.82	95th Driest	Driest since: 1965	1976
December 1966 1-Month	0.67	-0.15	0.82	36th Wettest	Wettest since: 1964	1964
Nov–Dec 1966 2-Month	0.30	0.02	0.28	74th Driest	Driest since: 1965	1936, 1976
Nov–Dec 1966 2-Month	0.30	0.02	0.28	57th Wettest	Wettest since: 1964	1927
Oct–Dec 1966 3-Month	0.33	-0.01	0.34	78th Driest	Driest since: 1965	1936
Oct–Dec 1966 3-Month	0.33	-0.01	0.34	53rd Wettest	Wettest since: 1964	1927
Sep–Dec 1966 4-Month	-0.29	-0.01	-0.28	60th Driest	Driest since: 1965	1936
	-0.29	-0.01	-0.28	71st Wettest	Wettest since: 1964	1927
	Ties: 1931, 1937
Aug–Dec 1966 5-Month	-0.35	-0.01	-0.34	57th Driest	Driest since: 1965	1936
	-0.35	-0.01	-0.34	74th Wettest	Wettest since: 1964	1927
	Ties: 1911
Jul–Dec 1966 6-Month	-0.57	0.01	-0.58	51st Driest	Driest since: 1965	1936
Jul–Dec 1966 6-Month	-0.57	0.01	-0.58	80th Wettest	Wettest since: 1964	1927
Jun–Dec 1966 7-Month	-0.60	0.01	-0.61	49th Driest	Driest since: 1965	1936
Jun–Dec 1966 7-Month	-0.60	0.01	-0.61	82nd Wettest	Wettest since: 1964	1995
May–Dec 1966 8-Month	-0.88	0.02	-0.90	28th Driest	Driest since: 1963	1936
	-0.88	0.02	-0.90	103rd Wettest	Wettest since: 1965	1927
	Ties: 1924, 1963
Apr–Dec 1966 9-Month	-0.99	0.02	-1.01	24th Driest	Driest since: 1952	1936
Apr–Dec 1966 9-Month	-0.99	0.02	-1.01	107th Wettest	Wettest since: 1965	1927
Mar–Dec 1966 10-Month	-0.73	0.01	-0.74	27th Driest	Driest since: 1952	1936
Mar–Dec 1966 10-Month	-0.73	0.01	-0.74	104th Wettest	Wettest since: 1965	1948
Feb–Dec 1966 11-Month	-0.71	0.01	-0.72	27th Driest	Driest since: 1952	1936
Feb–Dec 1966 11-Month	-0.71	0.01	-0.72	104th Wettest	Wettest since: 1965	1927
Jan–Dec 1966 12-Month	-0.66	0.02	-0.68	28th Driest	Driest since: 1963	1987
	-0.66	0.02	-0.68	103rd Wettest	Wettest since: 1965	1927
	Ties: 1963
Jul 1965–Dec 1966 18-Month	-0.71	0.02	-0.73	20th Driest	Driest since: 1944	1936
Jul 1965–Dec 1966 18-Month	-0.71	0.02	-0.73	110th Wettest	Wettest since: 1965	1927
Jan 1965–Dec 1966 24-Month	-0.49	0.02	-0.51	29th Driest	Driest since: 1952	1936
	-0.49	0.02	-0.51	101st Wettest	Wettest since: 1965	1996
	Ties: 1922
Jan 1964–Dec 1966 36-Month	0.16	0.02	0.14	86th Driest	Driest since: 1965	1936
Jan 1964–Dec 1966 36-Month	0.16	0.02	0.14	43rd Wettest	Wettest since: 1965	1997
Jan 1963–Dec 1966 48-Month	-0.05	0.02	-0.07	59th Driest	Driest since: 1963	1937
Jan 1963–Dec 1966 48-Month	-0.05	0.02	-0.07	69th Wettest	Wettest since: 1965	1998
Jan 1962–Dec 1966 60-Month	-0.04	0.02	-0.06	62nd Driest	Driest since: 1953	1938
Jan 1962–Dec 1966 60-Month	-0.04	0.02	-0.06	65th Wettest	Wettest since: 1965	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 1966 Palmer Z-Index Rankings

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