When to plant in Stevensville, MT

Planting dates worked out from Stevensville's own frost records, not a generic zone chart.

Safe to plant out

Jun 10

1 year in 10 has a later frost

Average last frost

May 23

about a 50% chance of a later one

Average first fall frost

Sep 14

1 year in 10 by Sep 4

Frost-free days

112

median, 1991–2020

Station used: Stevensville · 0.4 km away · station 1018 m, town 1013 m. How we match towns to stations

This season

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Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Apr 15 – Apr 29	Jun 10 – Jun 24	Aug 4
Sweet pepper	Apr 1 – Apr 15	Jun 10 – Jun 24	Aug 9
Lettuce (leaf)	Mar 21 – Mar 28	Apr 25 – May 9	Jun 4
Peas	—	Apr 11 – May 9	Jun 5
Bush beans	—	Jun 3 – Jun 24	Jul 23
Carrot	—	May 2 – Jun 13	Jul 1
Beet	—	Apr 25 – Jun 6	Jun 14
Potato	—	May 2 – May 23	Jul 11
Kale	Mar 14 – Mar 28	Apr 25 – May 9	Jun 7
Broccoli	Mar 14 – Mar 28	Apr 25 – May 16	Jun 24
Cucumber	May 13 – May 20	Jun 10 – Jun 24	Jul 30
Summer squash and zucchini	May 13 – May 20	Jun 10 – Jun 24	Jul 25
Winter squash	May 13 – May 20	Jun 10 – Jun 24	Aug 29
Sweet corn	—	Jun 3 – Jun 24	Aug 2
Onion (from sets)	—	Apr 25 – May 16	Jul 24
Garlic	—	Aug 31 – Sep 28 (fall)	following summer
Spinach	—	Apr 11 – May 9	May 19
Basil	Apr 29 – May 13	Jun 10 – Jun 24	Aug 6

Plan all 65 crops for Stevensville

Stevensville's weather over time

How the growing season has shifted here, year by year, from the station's own records.

Each year's last spring frostLong-term trend

See the data as a table

Year	Last spring frost
1912	May 18
1913	May 17
1914	May 29
1915	May 6
1916	Jun 21
1917	Jun 3
1918	May 29
1919	May 17
1922	May 30
1923	Jun 14
1924	Jun 7
1925	Jun 15
1926	Jun 12
1927	Jun 1
1928	Jun 16
1929	Jun 20
1930	Jun 4
1931	Jul 1
1932	Jul 5
1933	May 28
1934	May 21
1935	Jun 3
1936	May 18
1937	Jun 11
1938	Jun 11
1939	Jun 2
1940	May 18
1941	May 20
1942	Jun 22
1943	May 20
1944	May 25
1945	Jun 16
1946	Jun 7
1947	Jun 30
1948	May 15
1949	Jun 30
1950	Jun 10
1951	Jun 3
1952	Jun 13
1953	Jun 26
1954	Jun 18
1955	May 28
1956	Apr 23
1957	Apr 27
1958	May 4
1959	May 29
1960	Jun 18
1961	May 28
1962	Jun 6
1963	May 20
1964	May 26
1965	Jun 28
1966	Jun 13
1967	May 27
1968	May 31
1969	Jun 13
1970	May 31
1971	Jul 7
1972	May 26
1973	Jun 11
1974	Jun 1
1976	May 29
1977	May 30
1978	May 30
1979	Jun 8
1980	May 12
1981	May 12
1982	Jun 1
1983	Jul 3
1984	Jun 2
1985	May 17
1986	May 24
1987	Jun 3
1988	May 20
1989	May 30
1990	May 26
1991	Jun 18
1992	May 18
1993	May 10
1995	Jun 7
1996	May 30
1997	May 21
1998	May 28
1999	Jun 10
2000	Jun 11
2001	Jun 5
2002	May 17
2003	May 20
2004	May 14
2005	May 25
2006	May 30
2007	May 23
2008	May 10
2009	May 22
2010	May 21
2011	May 31
2012	Jun 7
2013	May 2
2014	May 14
2015	May 10
2016	Apr 19
2017	Jun 11
2019	May 3
2020	May 8
2021	May 29
2022	May 11
2023	Apr 28
2024	May 30
2025	May 18
2026	Jun 7

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1912	103
1913	115
1914	106
1915	145
1916	58
1917	130
1918	131
1919	127
1922	98
1923	89
1924	83
1925	93
1926	91
1927	90
1928	58
1929	58
1930	88
1931	76
1932	56
1933	96
1934	110
1935	82
1936	98
1937	51
1938	107
1939	96
1940	140
1941	118
1942	89
1943	110
1944	115
1945	71
1946	93
1947	72
1948	113
1949	73
1950	92
1951	92
1952	92
1953	69
1954	79
1955	112
1956	132
1957	135
1958	121
1959	95
1960	70
1961	101
1962	89
1963	117
1964	100
1965	62
1966	108
1967	109
1968	115
1969	77
1970	100
1971	66
1972	103
1973	82
1974	92
1976	89
1977	92
1978	109
1979	94
1980	98
1981	130
1982	101
1983	63
1984	102
1985	86
1986	120
1987	93
1988	114
1989	98
1990	132
1991	95
1992	98
1993	106
1995	105
1997	120
1998	115
1999	38
2000	87
2001	106
2002	126
2003	116
2004	140
2005	108
2006	110
2007	109
2008	123
2009	123
2010	107
2011	112
2012	96
2013	147
2014	120
2015	140
2016	146
2017	103
2019	147
2020	122
2021	110
2022	150
2023	173
2024	125
2025	130

Each year's average temperature, April to SeptemberLong-term trend

See the data as a table

Year	Growing-season temperature
1912	12.7 °C
1913	13.5 °C
1914	14.3 °C
1915	11.9 °C
1916	12.5 °C
1917	13.9 °C
1918	13.6 °C
1919	15.0 °C
1920	12.9 °C
1922	13.8 °C
1923	13.8 °C
1924	13.8 °C
1925	14.9 °C
1926	13.4 °C
1927	12.7 °C
1928	13.4 °C
1929	13.2 °C
1930	14.7 °C
1931	14.6 °C
1932	14.0 °C
1933	13.2 °C
1934	14.9 °C
1935	13.3 °C
1936	15.1 °C
1937	14.2 °C
1938	14.5 °C
1939	14.4 °C
1940	15.3 °C
1941	14.2 °C
1942	13.7 °C
1943	13.3 °C
1944	13.4 °C
1945	13.1 °C
1946	13.3 °C
1947	13.4 °C
1948	13.8 °C
1949	14.5 °C
1950	12.7 °C
1951	13.4 °C
1952	14.4 °C
1953	13.4 °C
1954	13.4 °C
1955	13.0 °C
1957	14.6 °C
1958	14.9 °C
1959	13.6 °C
1960	14.2 °C
1961	14.4 °C
1962	13.4 °C
1963	13.8 °C
1964	12.7 °C
1965	12.6 °C
1966	14.1 °C
1967	14.3 °C
1968	13.2 °C
1969	14.2 °C
1970	13.5 °C
1971	13.7 °C
1972	13.7 °C
1973	14.1 °C
1974	13.8 °C
1976	14.0 °C
1977	14.0 °C
1978	13.7 °C
1980	14.1 °C
1981	14.2 °C
1982	13.6 °C
1983	13.6 °C
1984	13.8 °C
1985	14.7 °C
1986	14.5 °C
1987	14.9 °C
1988	15.1 °C
1989	14.4 °C
1990	14.7 °C
1991	14.5 °C
1992	15.0 °C
1997	14.1 °C
1998	15.2 °C
1999	13.2 °C
2000	14.8 °C
2005	14.9 °C
2006	16.2 °C
2007	16.3 °C
2008	14.5 °C
2009	15.9 °C
2010	14.5 °C
2011	14.7 °C
2012	14.9 °C
2013	15.4 °C
2014	15.1 °C
2015	15.6 °C
2016	14.9 °C
2017	14.9 °C
2018	14.9 °C
2019	14.6 °C
2020	14.7 °C
2021	16.2 °C
2022	15.1 °C
2023	16.2 °C
2024	16.2 °C
2025	16.6 °C

What this means for you: Since 1912, Stevensville's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 3 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Stevensville (NOAA GHCN-Daily). Years with too many missing days are left out.

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