ValueRankAnomalyMean

Divisional Palmer Z-Index

September - November 1915

-4-3-2-11234

Oregon (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -0.31

Rank: 56th Driest

Anomaly: -0.32

Mean: 0.01

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September - November 1915 Oregon Divisional Palmer Z-Index

Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Coastal Area	-0.13	59	-0.13	0.00
2. Willamette Valley	0.15	70	0.12	0.03
3. Southwestern Valleys	-0.54	48	-0.52	-0.02
4. Northern Cascades	0.15	70	0.13	0.02
5. High Plateau	-0.33	50	-0.35	0.02
6. North Central	0.12	75	0.06	0.07
7. South Central	-0.05	64	-0.12	0.07
8. Northeast	-0.67	39	-0.68	0.01
9. Southeast	-0.84	29	-0.82	-0.02

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 13, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping