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

Divisional Time Series

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.

State:

Division:

Parameter:

Time Scale:

Month:

Start Year:

End Year:

Base Period Display Base Period
Start: End:

Trend

Display Trend Start: End:

Download: CSV JSON XML

Montana, Climate Division 6 Palmer Z-Index
November-January
Period	Z-Index	Rank (out of 130)
November 2024-January 2025	0.30	88
November 2023-January 2024	-0.70	13
November 2022-January 2023	0.22	82
November 2021-January 2022	-0.53	23
November 2020-January 2021	-0.62	18
November 2019-January 2020	0.55	104
November 2018-January 2019	0.79	112
November 2017-January 2018	-0.18	50
November 2016-January 2017	-0.10	56
November 2015-January 2016	0.09	67
November 2014-January 2015	0.10	69
November 2013-January 2014	0.40	92
November 2012-January 2013	0.44	97
November 2011-January 2012	-0.31	41
November 2010-January 2011	2.31	129
November 2009-January 2010	0.09	67
November 2008-January 2009	0.88	117
November 2007-January 2008	-0.96	2
November 2006-January 2007	-0.83	9
November 2005-January 2006	0.13	72
November 2004-January 2005	-0.35	38
November 2003-January 2004	1.11	121
November 2002-January 2003	-0.57	19
November 2001-January 2002	-0.95	3
November 2000-January 2001	0.51	101
November 1999-January 2000	-0.88	6
November 1998-January 1999	1.64	126
November 1997-January 1998	-0.85	7
November 1996-January 1997	1.09	120
November 1995-January 1996	0.49	98
November 1994-January 1995	-0.27	44
November 1993-January 1994	0.59	107
November 1992-January 1993	0.14	74
November 1991-January 1992	-0.53	23
November 1990-January 1991	-0.38	33
November 1989-January 1990	0.41	93
November 1988-January 1989	0.42	94
November 1987-January 1988	-1.01	1
November 1986-January 1987	0.23	83
November 1985-January 1986	0.20	78
November 1984-January 1985	-0.41	31
November 1983-January 1984	-0.23	45
November 1982-January 1983	0.06	62
November 1981-January 1982	0.55	104
November 1980-January 1981	-0.48	27
November 1979-January 1980	-0.36	37
November 1978-January 1979	0.87	116
November 1977-January 1978	0.74	111
November 1976-January 1977	0.16	75
November 1975-January 1976	0.66	110
November 1974-January 1975	-0.38	33
November 1973-January 1974	0.31	90
November 1972-January 1973	-0.50	25
November 1971-January 1972	0.21	79
November 1970-January 1971	1.00	119
November 1969-January 1970	0.06	62
November 1968-January 1969	0.97	118
November 1967-January 1968	0.03	59
November 1966-January 1967	0.31	90
November 1965-January 1966	-0.37	35
November 1964-January 1965	0.85	114
November 1963-January 1964	-0.65	14
November 1962-January 1963	-0.55	21
November 1961-January 1962	-0.85	7
November 1960-January 1961	-0.65	14
November 1959-January 1960	0.22	82
November 1958-January 1959	1.14	123
November 1957-January 1958	-0.79	12
November 1956-January 1957	-0.04	58
November 1955-January 1956	-0.18	50
November 1954-January 1955	-0.91	5
November 1953-January 1954	0.11	70
November 1952-January 1953	-0.50	25
November 1951-January 1952	0.19	77
November 1950-January 1951	0.04	60
November 1949-January 1950	-0.22	46
November 1948-January 1949	0.87	116
November 1947-January 1948	-0.07	57
November 1946-January 1947	0.17	76
November 1945-January 1946	0.57	106
November 1944-January 1945	0.10	69
November 1943-January 1944	-0.80	10
November 1942-January 1943	0.62	109
November 1941-January 1942	-0.16	52
November 1940-January 1941	-0.46	28
November 1939-January 1940	-0.63	17
November 1938-January 1939	0.28	85
November 1937-January 1938	-0.29	43
November 1936-January 1937	-0.22	46
November 1935-January 1936	0.50	100
November 1934-January 1935	-0.42	30
November 1933-January 1934	0.61	108
November 1932-January 1933	-0.14	55
November 1931-January 1932	-0.65	14
November 1930-January 1931	-0.57	19
November 1929-January 1930	0.82	113
November 1928-January 1929	-0.31	41
November 1927-January 1928	1.22	124
November 1926-January 1927	0.54	102
November 1925-January 1926	0.29	87
November 1924-January 1925	0.04	60
November 1923-January 1924	-0.19	48
November 1922-January 1923	0.12	71
November 1921-January 1922	-0.19	48
November 1920-January 1921	-0.94	4
November 1919-January 1920	0.43	95
November 1918-January 1919	0.22	82
November 1917-January 1918	0.33	91
November 1916-January 1917	0.50	100
November 1915-January 1916	1.14	123
November 1914-January 1915	-0.33	40
November 1913-January 1914	-0.43	29
November 1912-January 1913	-0.40	32
November 1911-January 1912	0.29	87
November 1910-January 1911	0.08	64
November 1909-January 1910	0.09	67
November 1908-January 1909	-0.15	53
November 1907-January 1908	-0.80	10
November 1906-January 1907	2.62	130
November 1905-January 1906	-0.37	35
November 1904-January 1905	-0.35	38
November 1903-January 1904	0.44	97
November 1902-January 1903	0.56	105
November 1901-January 1902	0.14	74
November 1900-January 1901	-0.15	53
November 1899-January 1900	-0.55	21
November 1898-January 1899	1.64	126
November 1897-January 1898	0.24	84
November 1896-January 1897	1.75	127
November 1895-January 1896	1.83	128

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Divisional Time Series, published August 2025, retrieved on August 15, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/time-series

Request Parameter	Type	Description
scope	String	Accepted Values national National regional Regional statewide Statewide divisional Divisional county County city City
location	String	Accepted Values (click scope to toggle) National ↓ Regional ↓ Statewide ↓ Divisional ↓ County ↓ City ↓ (start dates are in parentheses)
parameter	String	Accepted Values* tavg Average Temperature tmax Maximum Temperature tmin Minimum Temperature pcp Precipitation cdd Cooling Degree Days hdd Heating Degree Days pdsi Palmer Drought Severity Index (PDSI) phdi Palmer Hydrological Drought Index (PHDI) pmdi Palmer Modified Drought Index (PMDI) zndx Palmer Z-Index Please note, not all parameters are available for all locations and timescales. More info ↓ Degree Days* are not available for: Cities Alaska Hawaii Great Plains Souther Plains and Gulf Coast Rockies and Westward River Basins Agricultural Belts Palmer Indices are not available for: Cities Alaska Hawaii PDSI, PHDI, and PMDI are not offered for multiple-month time scales.
timescale	Integer, String	Accepted Values 1-99 Number of Months ytd Year to Date
month	Integer	Accepted Values 1-12 January-December 0 All Months
startYear	Integer	4-digit year (must be less than or equal to endYear) 1895-2025
endYear	Integer	4-digit year (must be greater than or equal to startYear) 1895-2025
format	String	Accepted Values csv Comma-Separated Values json JavaScript Object Notation xml Extensible Markup Language
basePeriod	Boolean	Accepted Values true Return anomalies based on the requested base period mean false Return no anomalies
basePeriodBegYear	Integer	4-digit year (must be less than or equal to basePeriodEndYear) 1895-2025
basePeriodEndYear	Integer	4-digit year (must be greater than or equal to basePeriodBegYear) 1895-2025

Climate at a Glance Divisional Time Series

Divisional Time Series

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