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 1997 Palmer Z-Index Rankings

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Driest/Wettest Since	Record
December 1997 1-Month	-1.65	-0.15	-1.50	36th Driest	Driest since: 1993	1976
December 1997 1-Month	-1.65	-0.15	-1.50	95th Wettest	Wettest since: 1996	1964
Nov–Dec 1997 2-Month	-1.19	0.02	-1.21	37th Driest	Driest since: 1993	1936, 1976
Nov–Dec 1997 2-Month	-1.19	0.02	-1.21	94th Wettest	Wettest since: 1996	1927
Oct–Dec 1997 3-Month	-0.40	-0.01	-0.39	54th Driest	Driest since: 1993	1936
Oct–Dec 1997 3-Month	-0.40	-0.01	-0.39	77th Wettest	Wettest since: 1996	1927
Sep–Dec 1997 4-Month	-0.09	-0.01	-0.08	72nd Driest	Driest since: 1993	1936
Sep–Dec 1997 4-Month	-0.09	-0.01	-0.08	59th Wettest	Wettest since: 1996	1927
Aug–Dec 1997 5-Month	0.08	-0.01	0.09	79th Driest	Driest since: 1994	1936
Aug–Dec 1997 5-Month	0.08	-0.01	0.09	52nd Wettest	Wettest since: 1996	1927
Jul–Dec 1997 6-Month	0.68	0.01	0.67	100th Driest	Driest since: 1996	1936
Jul–Dec 1997 6-Month	0.68	0.01	0.67	31st Wettest	Wettest since: 1995	1927
Jun–Dec 1997 7-Month	0.45	0.01	0.44	94th Driest	Driest since: 1996	1936
	0.45	0.01	0.44	37th Wettest	Wettest since: 1995	1995
	Ties: 1896, 1899
May–Dec 1997 8-Month	0.26	0.02	0.24	81st Driest	Driest since: 1994	1936
May–Dec 1997 8-Month	0.26	0.02	0.24	50th Wettest	Wettest since: 1996	1927
Apr–Dec 1997 9-Month	0.61	0.02	0.59	95th Driest	Driest since: 1994	1936
Apr–Dec 1997 9-Month	0.61	0.02	0.59	36th Wettest	Wettest since: 1996	1927
Mar–Dec 1997 10-Month	0.82	0.01	0.81	111th Driest	Driest since: 1996	1936
Mar–Dec 1997 10-Month	0.82	0.01	0.81	20th Wettest	Wettest since: 1995	1948
Feb–Dec 1997 11-Month	0.75	0.01	0.74	115th Driest	Driest since: 1996	1936
	0.75	0.01	0.74	16th Wettest	Wettest since: 1996	1927
	Ties: 1996
Jan–Dec 1997 12-Month	0.84	0.02	0.82	117th Driest	Driest since: 1994	1987
	0.84	0.02	0.82	14th Wettest	Wettest since: 1996	1927
	Ties: 1968
Jul 1996–Dec 1997 18-Month	0.71	0.02	0.69	116th Driest	Driest since: 1994	1936
Jul 1996–Dec 1997 18-Month	0.71	0.02	0.69	14th Wettest	Wettest since: 1996	1927
Jan 1996–Dec 1997 24-Month	0.87	0.02	0.85	125th Driest	Driest since: 1995	1936
Jan 1996–Dec 1997 24-Month	0.87	0.02	0.85	5th Wettest	Wettest since: 1996	1996
Jan 1995–Dec 1997 36-Month	1.06	0.02	1.04	128th Driest	Driest since: 1996	1936
Jan 1995–Dec 1997 36-Month	1.06	0.02	1.04	1st Wettest	Wettest to Date	1997
Jan 1994–Dec 1997 48-Month	0.63	0.02	0.61	125th Driest	Driest since: 1996	1937
Jan 1994–Dec 1997 48-Month	0.63	0.02	0.61	3rd Wettest	Wettest since: 1948	1998
Jan 1993–Dec 1997 60-Month	0.53	0.02	0.51	121st Driest	Driest since: 1996	1938
	0.53	0.02	0.51	6th Wettest	Wettest since: 1984	1999
	Ties: 1984

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 1997 Palmer Z-Index Rankings

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