When to plant in Corunna, MI

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

Safe to plant out

May 15

1 year in 10 has a later frost

Average last frost

May 3

about a 50% chance of a later one

Average first fall frost

Oct 12

1 year in 10 by Oct 2

Frost-free days

160

median, 1991–2020

Station used: Owosso Wwtp · 6.3 km away · station 222 m, town 227 m. How we match towns to stations

This season

Plan your garden.

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Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Mar 20 – Apr 3	May 15 – May 29	Jul 9
Sweet pepper	Mar 6 – Mar 20	May 15 – May 29	Jul 14
Lettuce (leaf)	Mar 4 – Mar 11	Apr 8 – Apr 22	May 18
Peas	—	Apr 8 – May 6	Jun 2
Bush beans	—	May 8 – May 29	Jun 27
Carrot	—	Apr 19 – May 31	Jun 18
Beet	—	Apr 19 – May 31	Jun 8
Potato	—	Apr 19 – May 10	Jun 28
Kale	Mar 4 – Mar 18	Apr 15 – Apr 29	May 28
Broccoli	Feb 25 – Mar 11	Apr 8 – Apr 29	Jun 7
Cucumber	Apr 17 – Apr 24	May 15 – May 29	Jul 4
Summer squash and zucchini	Apr 17 – Apr 24	May 15 – May 29	Jun 29
Winter squash	Apr 17 – Apr 24	May 15 – May 29	Aug 3
Sweet corn	—	May 8 – May 29	Jul 7
Onion (from sets)	—	Apr 8 – Apr 29	Jul 7
Garlic	—	Sep 28 – Oct 26 (fall)	following summer
Spinach	—	Apr 8 – May 6	May 16
Basil	Apr 3 – Apr 17	May 15 – May 29	Jul 11

Plan all 65 crops for Corunna

Corunna'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
1896	Apr 22
1897	Apr 27
1898	May 14
1900	May 10
1901	May 13
1902	May 28
1904	May 16
1906	May 29
1908	May 5
1909	May 4
1910	May 13
1911	May 5
1912	Apr 28
1913	Jun 8
1915	May 27
1916	Apr 10
1917	May 23
1918	Apr 18
1919	May 3
1920	May 15
1921	May 16
1922	Apr 29
1923	May 14
1924	May 22
1926	May 24
1929	May 22
1930	May 30
1931	May 25
1933	Apr 27
1934	May 12
1935	May 24
1936	May 4
1937	May 15
1938	May 13
1939	May 18
1940	May 4
1941	May 12
1942	May 10
1943	May 4
1944	Apr 28
1945	May 14
1946	May 13
1947	May 10
1948	Apr 22
1949	May 11
1950	May 8
1951	May 13
1952	May 16
1953	Apr 28
1954	May 26
1956	May 24
1957	May 16
1958	May 26
1959	May 1
1960	May 8
1961	May 30
1962	Apr 24
1963	May 23
1964	Apr 25
1965	Apr 19
1966	May 13
1967	May 12
1968	May 6
1969	May 26
1970	May 6
1971	May 22
1972	May 10
1973	May 18
1974	May 7
1975	Apr 26
1976	May 12
1977	May 10
1978	May 3
1979	May 5
1980	May 9
1981	May 19
1982	Apr 29
1983	May 9
1984	May 16
1987	May 6
1988	Apr 26
1989	May 8
1991	Apr 18
1993	Apr 28
1994	May 3
1995	May 2
1996	May 14
1997	May 17
1998	Apr 29
1999	Apr 26
2000	Apr 28
2002	May 19
2003	May 4
2004	May 4
2005	May 5
2006	Apr 29
2007	Apr 17
2008	May 28
2009	Apr 24
2010	May 11
2011	Apr 20
2012	Apr 30
2013	May 14
2015	Apr 29
2016	Apr 28
2017	May 10
2018	Apr 30
2019	Apr 28
2020	May 14
2021	May 13
2022	Apr 30
2023	Apr 27
2024	Apr 26
2025	May 10
2026	May 3

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1896	153
1897	146
1898	119
1900	159
1901	142
1908	149
1909	152
1910	146
1911	155
1912	178
1913	97
1915	124
1917	109
1918	165
1919	162
1922	166
1923	143
1924	151
1926	124
1929	119
1930	123
1931	139
1933	168
1934	154
1935	126
1936	143
1937	127
1938	141
1939	135
1940	144
1941	139
1942	135
1943	142
1944	148
1945	138
1946	140
1947	137
1948	164
1949	157
1950	138
1951	138
1952	139
1953	147
1954	119
1956	118
1957	133
1958	132
1959	138
1960	145
1961	121
1962	182
1963	113
1964	155
1965	160
1966	135
1967	147
1968	151
1969	141
1970	145
1971	162
1972	151
1973	153
1974	137
1975	158
1976	134
1977	149
1978	157
1979	158
1980	157
1981	136
1982	169
1983	153
1984	137
1987	150
1991	155
1993	154
1996	142
1997	152
1998	175
1999	163
2000	161
2002	147
2003	150
2004	153
2005	156
2006	166
2007	193
2008	128
2009	159
2010	163
2011	184
2012	160
2013	160
2015	170
2016	179
2017	168
2018	170
2019	173
2020	141
2021	173
2022	160
2023	178
2024	181

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

See the data as a table

Year	Growing-season temperature
1896	17.4 °C
1897	16.5 °C
1898	17.8 °C
1900	18.1 °C
1901	17.6 °C
1902	16.8 °C
1906	17.5 °C
1907	15.2 °C
1908	17.5 °C
1909	16.5 °C
1910	16.9 °C
1911	18.4 °C
1912	17.5 °C
1913	17.9 °C
1915	16.2 °C
1916	17.7 °C
1917	15.4 °C
1918	17.4 °C
1919	17.4 °C
1922	17.8 °C
1923	17.3 °C
1926	15.9 °C
1929	16.8 °C
1930	17.9 °C
1931	18.0 °C
1933	19.6 °C
1934	18.7 °C
1935	16.5 °C
1936	17.6 °C
1937	17.4 °C
1938	17.8 °C
1939	18.1 °C
1940	16.8 °C
1941	18.3 °C
1942	17.1 °C
1943	16.2 °C
1944	17.5 °C
1945	16.0 °C
1946	16.6 °C
1947	16.9 °C
1948	17.4 °C
1949	17.6 °C
1950	15.3 °C
1951	15.9 °C
1952	17.2 °C
1953	16.8 °C
1954	16.2 °C
1956	15.9 °C
1957	16.5 °C
1958	16.2 °C
1959	18.3 °C
1960	16.7 °C
1961	16.4 °C
1962	16.9 °C
1963	16.1 °C
1964	16.5 °C
1965	15.9 °C
1966	15.6 °C
1967	15.9 °C
1968	16.8 °C
1969	16.7 °C
1970	17.2 °C
1971	16.6 °C
1972	16.1 °C
1973	17.2 °C
1974	16.3 °C
1975	16.5 °C
1976	16.8 °C
1977	17.9 °C
1978	17.1 °C
1979	16.6 °C
1980	17.1 °C
1981	16.7 °C
1982	16.5 °C
1983	17.2 °C
1984	16.8 °C
1986	16.1 °C
1987	17.5 °C
1988	16.7 °C
1989	15.7 °C
1991	17.3 °C
1993	15.3 °C
1996	15.6 °C
1997	14.7 °C
1998	17.9 °C
1999	17.3 °C
2000	15.7 °C
2001	16.4 °C
2002	17.2 °C
2003	15.6 °C
2004	16.3 °C
2005	17.6 °C
2006	16.8 °C
2007	17.0 °C
2008	16.6 °C
2009	15.8 °C
2010	18.1 °C
2011	16.9 °C
2012	17.3 °C
2013	16.9 °C
2015	17.5 °C
2016	17.5 °C
2017	17.4 °C
2018	17.5 °C
2019	16.8 °C
2020	16.5 °C
2021	17.8 °C
2022	17.0 °C
2023	16.6 °C
2024	17.9 °C
2025	16.7 °C

What this means for you: Since 1896, Corunna's last spring frost has come about 1 day earlier per decade, on average. The frost-free season has grown by about 2 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

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

Nearby towns

Owosso New Haven Durand Perry Ovid Laingsburg