ValueAnomalyRankMean

Divisional Palmer Z-Index

October - December 2021

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Montana (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -0.88

Anomaly: -1.01

Rank: 27th Driest

Mean: 0.13

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October - December 2021 Montana Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. Western	-0.19	-0.19	63	0.00
2. Southwestern	-0.59	-0.86	39	0.27
3. North Central	-0.79	-0.86	22	0.08
4. Central	-1.53	-1.65	10	0.12
5. South Central	-0.96	-1.06	25	0.10
6. Northeastern	-0.15	-0.26	48	0.11
7. Southeastern	0.27	0.21	83	0.06

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published June 2025, retrieved on June 15, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping