Value Anomaly Rank Mean

Divisional Palmer Z-Index

October - December 1975

-4-3-2-11234

Washington (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

October - December 1975 Washington Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. West Olympic Coast	3.21	3.24	130	-0.04
2. North East Olympic San Juan	3.23	3.18	127	0.05
3. Puget Sound Lowlands	2.80	2.89	128	-0.09
4. East Olympic Cascade Foothills	2.49	2.56	128	-0.06
5. Cascade Mountains West	2.60	2.67	128	-0.07
6. East Slope Cascades	1.94	1.98	120	-0.04
7. Okanogan Big Bend	0.11	0.17	71	-0.06
8. Central Basin	-0.03	-0.05	67	0.02
9. Northeastern	0.46	0.64	86	-0.19
10. Palouse Blue Mountains	1.12	1.10	102	0.02

Citing This Page

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