When to plant in Winnebago, MN

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

Safe to plant out

May 13

1 year in 10 has a later frost

Average last frost

Apr 28

about a 50% chance of a later one

Average first fall frost

Oct 7

1 year in 10 by Sep 22

Frost-free days

157

median, 1991–2020

Station used: Winnebago · 0.4 km away · station 338 m, town 339 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 18 – Apr 1	May 13 – May 27	Jul 7
Sweet pepper	Mar 4 – Mar 18	May 13 – May 27	Jul 12
Lettuce (leaf)	Mar 5 – Mar 12	Apr 9 – Apr 23	May 19
Peas	—	Apr 9 – May 7	Jun 3
Bush beans	—	May 6 – May 27	Jun 25
Carrot	—	Apr 18 – May 30	Jun 17
Beet	—	Apr 18 – May 30	Jun 7
Potato	—	Apr 18 – May 9	Jun 27
Kale	Mar 5 – Mar 19	Apr 16 – Apr 30	May 29
Broccoli	Feb 26 – Mar 12	Apr 9 – Apr 30	Jun 8
Cucumber	Apr 15 – Apr 22	May 13 – May 27	Jul 2
Summer squash and zucchini	Apr 15 – Apr 22	May 13 – May 27	Jun 27
Winter squash	Apr 15 – Apr 22	May 13 – May 27	Aug 1
Sweet corn	—	May 6 – May 27	Jul 5
Onion (from sets)	—	Apr 9 – Apr 30	Jul 8
Garlic	—	Sep 23 – Oct 21 (fall)	following summer
Spinach	—	Apr 9 – May 7	May 17
Basil	Apr 1 – Apr 15	May 13 – May 27	Jul 9

Plan all 65 crops for Winnebago

Winnebago'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
1899	May 17
1903	May 3
1904	Apr 27
1905	Apr 30
1906	May 7
1907	Jun 7
1908	May 3
1909	May 10
1910	May 19
1911	May 3
1912	Apr 22
1913	Apr 28
1914	Apr 21
1915	May 18
1916	May 2
1917	May 27
1918	May 13
1919	Apr 26
1920	May 14
1921	May 16
1922	Apr 26
1923	May 12
1924	May 24
1925	May 17
1926	May 14
1927	Apr 24
1928	Apr 27
1929	May 19
1930	May 17
1931	May 7
1932	Apr 27
1933	Apr 27
1934	Apr 27
1935	May 3
1936	May 3
1937	May 14
1938	May 9
1939	Apr 21
1940	May 15
1941	Apr 24
1942	May 3
1943	May 13
1944	May 7
1945	Jun 3
1946	May 12
1947	May 29
1948	Apr 14
1949	Apr 24
1950	May 2
1951	Apr 24
1952	Apr 16
1953	May 14
1954	May 9
1955	May 8
1956	May 4
1957	May 5
1958	Apr 30
1959	Apr 21
1960	May 11
1961	May 3
1962	Apr 20
1963	May 23
1964	Apr 19
1965	Apr 28
1966	May 13
1967	May 12
1968	May 6
1969	May 13
1970	May 3
1971	May 13
1972	Apr 25
1973	May 3
1974	May 7
1975	Apr 21
1976	May 8
1977	Apr 8
1978	May 2
1979	May 12
1980	May 7
1981	May 11
1982	Apr 22
1983	Apr 20
1984	May 26
1985	Apr 10
1987	Apr 5
1988	Apr 27
1989	May 7
1990	May 3
1991	Apr 25
1992	Apr 28
1993	Apr 20
1994	Apr 30
1995	Apr 28
1996	May 1
1997	May 15
1998	Apr 17
1999	Apr 19
2000	Apr 21
2001	Apr 24
2002	May 4
2003	Apr 25
2004	May 15
2005	May 4
2006	Apr 8
2007	Apr 14
2008	Apr 29
2009	Apr 14
2010	May 9
2011	May 3
2012	Apr 20
2013	May 12
2015	Apr 23
2016	May 15
2017	Apr 28
2018	Apr 21
2019	Apr 29
2020	May 9
2021	Apr 25
2022	Apr 27
2023	Apr 26
2024	Apr 21
2025	Apr 20
2026	Apr 21

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1899	134
1903	167
1904	161
1905	163
1906	150
1907	109
1908	147
1909	154
1910	139
1911	157
1912	156
1913	146
1914	186
1915	142
1916	135
1917	131
1919	166
1920	138
1921	140
1922	165
1923	159
1924	149
1925	141
1926	133
1927	165
1928	148
1929	121
1930	133
1931	180
1932	160
1933	167
1934	146
1935	146
1936	156
1937	146
1938	165
1939	157
1940	132
1941	157
1942	143
1943	153
1944	154
1945	116
1946	152
1947	115
1948	178
1949	180
1950	153
1951	156
1952	170
1953	145
1954	150
1955	159
1956	148
1957	157
1958	153
1959	170
1960	160
1961	147
1962	185
1963	158
1964	172
1965	150
1966	140
1967	138
1968	150
1969	152
1970	159
1971	167
1972	157
1973	165
1974	137
1975	177
1976	150
1977	180
1978	158
1979	146
1980	150
1981	143
1982	176
1983	155
1984	122
1985	168
1987	180
1988	159
1989	138
1990	159
1991	146
1992	153
1993	164
1994	177
1995	146
1996	154
1997	151
1998	178
1999	165
2000	167
2001	156
2002	154
2003	157
2004	139
2005	156
2006	185
2007	153
2008	169
2009	177
2010	171
2011	134
2012	155
2013	159
2015	175
2016	150
2017	181
2018	172
2019	165
2020	145
2021	180
2022	163
2023	184
2024	176
2025	185

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

See the data as a table

Year	Growing-season temperature
1899	17.2 °C
1903	16.3 °C
1904	16.1 °C
1905	17.2 °C
1906	17.9 °C
1907	15.1 °C
1908	17.4 °C
1909	16.2 °C
1910	18.1 °C
1911	18.0 °C
1912	17.1 °C
1913	17.7 °C
1914	17.9 °C
1915	16.2 °C
1916	17.2 °C
1917	16.2 °C
1918	16.7 °C
1919	18.2 °C
1920	15.8 °C
1921	18.7 °C
1922	18.3 °C
1923	17.7 °C
1924	15.5 °C
1925	18.0 °C
1926	16.9 °C
1927	16.0 °C
1928	15.9 °C
1929	16.5 °C
1930	18.0 °C
1931	18.9 °C
1932	17.7 °C
1933	18.5 °C
1934	18.8 °C
1935	16.9 °C
1936	18.8 °C
1937	18.0 °C
1938	17.7 °C
1939	18.6 °C
1940	16.5 °C
1941	18.5 °C
1942	16.3 °C
1943	16.1 °C
1944	16.3 °C
1945	14.8 °C
1946	16.5 °C
1947	16.5 °C
1948	17.6 °C
1949	17.7 °C
1950	15.0 °C
1951	15.4 °C
1952	17.2 °C
1953	16.8 °C
1954	16.9 °C
1955	19.2 °C
1956	16.5 °C
1957	16.6 °C
1958	16.5 °C
1959	17.6 °C
1960	16.6 °C
1961	15.6 °C
1962	16.0 °C
1963	17.1 °C
1964	16.9 °C
1965	15.5 °C
1966	15.8 °C
1967	15.1 °C
1968	15.7 °C
1969	16.2 °C
1970	16.4 °C
1971	16.2 °C
1972	15.9 °C
1973	16.5 °C
1974	16.0 °C
1975	16.5 °C
1976	17.4 °C
1977	19.0 °C
1978	17.3 °C
1979	16.0 °C
1980	17.7 °C
1981	17.1 °C
1982	15.8 °C
1983	16.5 °C
1984	16.1 °C
1985	16.8 °C
1987	18.5 °C
1988	18.9 °C
1989	16.6 °C
1990	16.6 °C
1991	17.5 °C
1992	15.1 °C
1993	15.3 °C
1994	16.7 °C
1995	16.4 °C
1996	15.4 °C
1997	16.0 °C
1998	18.0 °C
1999	17.2 °C
2000	17.0 °C
2001	17.2 °C
2002	16.9 °C
2003	17.0 °C
2004	16.4 °C
2005	18.3 °C
2006	18.1 °C
2007	17.7 °C
2008	16.9 °C
2009	16.8 °C
2010	18.5 °C
2011	17.5 °C
2012	18.8 °C
2013	16.7 °C
2015	17.8 °C
2016	18.1 °C
2017	17.6 °C
2018	17.4 °C
2019	17.2 °C
2020	17.6 °C
2021	18.4 °C
2022	17.4 °C
2023	18.4 °C
2024	18.3 °C
2025	18.3 °C

What this means for you: Since 1899, Winnebago'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 Winnebago (NOAA GHCN-Daily). Years with too many missing days are left out.

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