Climate at a Glance | Divisional Mapping | National Centers for Environmental Information (NCEI)

Divisional Mapping

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Year:

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Time Scale:

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. Data are available for bulk download.

ValueRankAnomalyMean

Divisional Palmer Z-Index

October - December 1964

-4-3-2-11234

Montana (Hover over a Climate Division)

Z-IndexPalmer Z-Index: 1.17

Rank: 20th Wettest

Anomaly: 1.04

Mean: 0.13

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October - December 1964 Montana Divisional Palmer Z-Index
Climate Division	Value	Rank 130 Years	Anomaly	1901-2000 Mean
1. Western	2.49	121	2.49	0.00
2. Southwestern	1.13	97	0.86	0.27
3. North Central	0.53	90	0.45	0.08
4. Central	0.40	79	0.27	0.12
5. South Central	0.38	71	0.28	0.10
6. Northeastern	-0.14	50	-0.25	0.11
7. Southeastern	0.23	82	0.17	0.06

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published July 2025, retrieved on July 12, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping

Climate at a Glance Divisional Mapping

Divisional Mapping

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