When to plant in Marine City, MI
Planting dates worked out from Marine City's own frost records, not a generic zone chart.
Safe to plant out
May 9
1 year in 10 has a later frost
Average last frost
Apr 25
about a 50% chance of a later one
Average first fall frost
Oct 30
1 year in 10 by Oct 12
Frost-free days
188
median, 1991–2020
Station used: Port Huron · 29.0 km away · station 180 m, town 178 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 14 – Mar 28 | May 9 – May 23 | Jul 3 |
| Sweet pepper | Feb 28 – Mar 14 | May 9 – May 23 | Jul 8 |
| Lettuce (leaf) | Mar 3 – Mar 10 | Apr 7 – Apr 21 | May 17 |
| Peas | — | Apr 7 – May 5 | Jun 1 |
| Bush beans | — | May 2 – May 23 | Jun 21 |
| Carrot | — | Apr 17 – May 29 | Jun 16 |
| Beet | — | Apr 17 – May 29 | Jun 6 |
| Potato | — | Apr 17 – May 8 | Jun 26 |
| Kale | Mar 3 – Mar 17 | Apr 14 – Apr 28 | May 27 |
| Broccoli | Feb 24 – Mar 10 | Apr 7 – Apr 28 | Jun 6 |
| Cucumber | Apr 11 – Apr 18 | May 9 – May 23 | Jun 28 |
| Summer squash and zucchini | Apr 11 – Apr 18 | May 9 – May 23 | Jun 23 |
| Winter squash | Apr 11 – Apr 18 | May 9 – May 23 | Jul 28 |
| Sweet corn | — | May 2 – May 23 | Jul 1 |
| Onion (from sets) | — | Apr 7 – Apr 28 | Jul 6 |
| Garlic | — | Oct 10 – Nov 7 (fall) | following summer |
| Spinach | — | Apr 7 – May 5 | May 15 |
| Basil | Mar 28 – Apr 11 | May 9 – May 23 | Jul 5 |
Marine City'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 |
|---|---|
| 1934 | May 12 |
| 1935 | May 21 |
| 1937 | Apr 17 |
| 1938 | May 12 |
| 1939 | Apr 13 |
| 1941 | May 18 |
| 1943 | May 14 |
| 1944 | Apr 28 |
| 1945 | Jun 5 |
| 1946 | May 13 |
| 1948 | Apr 22 |
| 1949 | Apr 29 |
| 1950 | May 8 |
| 1951 | May 13 |
| 1952 | May 3 |
| 1953 | Apr 24 |
| 1954 | May 21 |
| 1956 | Apr 26 |
| 1957 | Apr 15 |
| 1958 | Apr 30 |
| 1959 | Apr 21 |
| 1960 | Apr 19 |
| 1961 | May 2 |
| 1962 | Apr 20 |
| 1963 | May 23 |
| 1964 | Apr 20 |
| 1965 | Apr 25 |
| 1966 | May 10 |
| 1967 | May 16 |
| 1968 | May 6 |
| 1969 | Apr 20 |
| 1970 | May 7 |
| 1971 | Apr 27 |
| 1972 | Apr 28 |
| 1973 | Apr 14 |
| 1974 | May 7 |
| 1975 | Apr 21 |
| 1976 | May 19 |
| 1977 | Apr 29 |
| 1978 | May 22 |
| 1979 | Apr 11 |
| 1980 | Apr 21 |
| 1981 | Apr 22 |
| 1982 | Apr 23 |
| 1983 | Apr 25 |
| 1984 | Apr 22 |
| 1985 | Apr 10 |
| 1986 | May 2 |
| 1987 | May 12 |
| 1988 | Apr 25 |
| 1989 | Apr 24 |
| 1990 | May 11 |
| 1991 | Apr 23 |
| 1992 | May 5 |
| 1993 | Apr 27 |
| 1994 | Apr 22 |
| 1995 | Apr 16 |
| 1996 | Apr 28 |
| 1997 | Apr 21 |
| 1998 | Apr 11 |
| 1999 | Apr 25 |
| 2000 | Apr 12 |
| 2001 | Apr 18 |
| 2002 | May 20 |
| 2003 | Apr 23 |
| 2004 | Apr 27 |
| 2005 | Apr 24 |
| 2006 | Apr 9 |
| 2007 | Apr 14 |
| 2008 | Apr 30 |
| 2009 | Apr 13 |
| 2010 | Apr 23 |
| 2011 | Apr 18 |
| 2012 | Apr 29 |
| 2013 | May 14 |
| 2014 | May 6 |
| 2015 | Apr 25 |
| 2017 | May 9 |
| 2018 | Apr 21 |
| 2019 | Apr 15 |
| 2020 | May 9 |
| 2021 | May 1 |
| 2022 | Apr 28 |
| 2023 | Apr 8 |
| 2024 | Apr 26 |
| 2025 | Apr 17 |
| 2026 | May 12 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1934 | 154 |
| 1937 | 177 |
| 1938 | 170 |
| 1941 | 145 |
| 1943 | 120 |
| 1944 | 148 |
| 1945 | 124 |
| 1946 | 176 |
| 1948 | 178 |
| 1949 | 177 |
| 1950 | 165 |
| 1951 | 138 |
| 1952 | 152 |
| 1953 | 166 |
| 1954 | 151 |
| 1956 | 196 |
| 1957 | 179 |
| 1958 | 164 |
| 1959 | 180 |
| 1960 | 187 |
| 1961 | 185 |
| 1962 | 186 |
| 1963 | 162 |
| 1964 | 167 |
| 1965 | 162 |
| 1966 | 172 |
| 1967 | 156 |
| 1968 | 176 |
| 1969 | 184 |
| 1970 | 161 |
| 1971 | 190 |
| 1972 | 167 |
| 1973 | 204 |
| 1974 | 153 |
| 1975 | 191 |
| 1976 | 150 |
| 1977 | 170 |
| 1978 | 138 |
| 1979 | 184 |
| 1980 | 183 |
| 1981 | 183 |
| 1982 | 175 |
| 1984 | 193 |
| 1985 | 214 |
| 1986 | 184 |
| 1987 | 144 |
| 1988 | 168 |
| 1989 | 152 |
| 1990 | 160 |
| 1991 | 157 |
| 1992 | 164 |
| 1993 | 165 |
| 1994 | 213 |
| 1995 | 200 |
| 1996 | 165 |
| 1997 | 183 |
| 1998 | 201 |
| 1999 | 192 |
| 2000 | 215 |
| 2001 | 181 |
| 2002 | 148 |
| 2003 | 196 |
| 2004 | 193 |
| 2005 | 199 |
| 2006 | 185 |
| 2007 | 215 |
| 2008 | 181 |
| 2009 | 206 |
| 2010 | 193 |
| 2011 | 205 |
| 2012 | 197 |
| 2013 | 163 |
| 2015 | 174 |
| 2017 | 182 |
| 2018 | 179 |
| 2019 | 204 |
| 2020 | 174 |
| 2021 | 185 |
| 2022 | 198 |
| 2023 | 205 |
| 2024 | 183 |
| 2025 | 198 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1934 | 17.5 °C |
| 1938 | 16.8 °C |
| 1941 | 16.7 °C |
| 1943 | 15.4 °C |
| 1944 | 16.6 °C |
| 1945 | 15.3 °C |
| 1946 | 16.6 °C |
| 1948 | 17.0 °C |
| 1949 | 17.6 °C |
| 1950 | 15.9 °C |
| 1951 | 16.7 °C |
| 1952 | 17.7 °C |
| 1953 | 17.3 °C |
| 1954 | 17.1 °C |
| 1956 | 16.2 °C |
| 1957 | 17.1 °C |
| 1958 | 16.9 °C |
| 1959 | 18.6 °C |
| 1960 | 17.1 °C |
| 1961 | 17.1 °C |
| 1962 | 17.4 °C |
| 1963 | 17.1 °C |
| 1964 | 17.8 °C |
| 1965 | 16.7 °C |
| 1966 | 16.8 °C |
| 1967 | 16.5 °C |
| 1968 | 17.5 °C |
| 1969 | 17.3 °C |
| 1970 | 17.2 °C |
| 1971 | 16.6 °C |
| 1972 | 15.2 °C |
| 1973 | 17.6 °C |
| 1974 | 16.2 °C |
| 1975 | 16.6 °C |
| 1976 | 16.4 °C |
| 1977 | 17.2 °C |
| 1978 | 16.9 °C |
| 1979 | 16.4 °C |
| 1980 | 16.9 °C |
| 1981 | 16.8 °C |
| 1982 | 16.0 °C |
| 1983 | 17.6 °C |
| 1984 | 16.8 °C |
| 1985 | 17.3 °C |
| 1986 | 16.7 °C |
| 1987 | 17.7 °C |
| 1988 | 17.5 °C |
| 1989 | 16.1 °C |
| 1990 | 16.0 °C |
| 1991 | 17.8 °C |
| 1992 | 15.4 °C |
| 1993 | 16.7 °C |
| 1994 | 17.2 °C |
| 1995 | 17.2 °C |
| 1996 | 16.7 °C |
| 1997 | 16.0 °C |
| 1998 | 18.2 °C |
| 2000 | 17.5 °C |
| 2001 | 17.5 °C |
| 2002 | 17.9 °C |
| 2003 | 16.3 °C |
| 2004 | 16.7 °C |
| 2005 | 18.3 °C |
| 2006 | 18.2 °C |
| 2007 | 17.4 °C |
| 2008 | 17.5 °C |
| 2009 | 16.6 °C |
| 2010 | 18.9 °C |
| 2011 | 17.7 °C |
| 2012 | 18.2 °C |
| 2013 | 17.1 °C |
| 2014 | 16.4 °C |
| 2015 | 17.5 °C |
| 2016 | 20.4 °C |
| 2017 | 18.2 °C |
| 2018 | 17.9 °C |
| 2019 | 17.5 °C |
| 2020 | 17.7 °C |
| 2021 | 18.8 °C |
| 2022 | 18.4 °C |
| 2023 | 17.6 °C |
| 2024 | 18.7 °C |
| 2025 | 16.8 °C |
What this means for you: Since 1934, Marine City's last spring frost has come about 1 day earlier per decade, on average. The frost-free season has grown by about 4 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Port Huron (NOAA GHCN-Daily). Years with too many missing days are left out.