Value Anomaly Rank Mean

Divisional Palmer Z-Index

November 1931 - January 1932

-4-3-2-11234

Oregon (Hover over a Climate Division)

Z-Index Palmer Z-Index : --

Anomaly: --

Rank: -- Driest

Mean: --

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*Signifies a tie

**Insufficient variability in the data record renders rank insignificant

November 1931 - January 1932 Oregon Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Coastal Area	0.27	0.30	80	-0.03
2. Willamette Valley	0.35	0.38	80	-0.03
3. Southwestern Valleys	0.12	0.17	77	-0.05
4. Northern Cascades	-0.20	-0.15	63	-0.05
5. High Plateau	-0.40	-0.34	61	-0.05
6. North Central	0.67	0.61	87	0.06
7. South Central	-0.65	-0.67	50	0.01
8. Northeast	0.25	0.12	72	0.13
9. Southeast	-0.61	-0.63	52	0.02

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on August 4, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping