When to plant in Sherman, CT
Planting dates worked out from Sherman's own frost records, not a generic zone chart.
Safe to plant out
May 19
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 17
1 year in 10 by Oct 1
Frost-free days
180
median, 1991–2020
Station used: Danbury · 20.8 km away · station 123 m, town 141 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 24 – Apr 7 | May 19 – Jun 2 | Jul 13 |
| Sweet pepper | Mar 10 – Mar 24 | May 19 – Jun 2 | Jul 18 |
| Lettuce (leaf) | Feb 23 – Mar 2 | Mar 30 – Apr 13 | May 9 |
| Peas | — | Mar 30 – Apr 27 | May 24 |
| Bush beans | — | May 12 – Jun 2 | Jul 1 |
| Carrot | — | Apr 7 – May 19 | Jun 6 |
| Beet | — | Apr 7 – May 19 | May 27 |
| Potato | — | Apr 7 – Apr 28 | Jun 16 |
| Kale | Feb 23 – Mar 9 | Apr 6 – Apr 20 | May 19 |
| Broccoli | Feb 16 – Mar 2 | Mar 30 – Apr 20 | May 29 |
| Cucumber | Apr 21 – Apr 28 | May 19 – Jun 2 | Jul 8 |
| Summer squash and zucchini | Apr 21 – Apr 28 | May 19 – Jun 2 | Jul 3 |
| Winter squash | Apr 21 – Apr 28 | May 19 – Jun 2 | Aug 7 |
| Sweet corn | — | May 12 – Jun 2 | Jul 11 |
| Onion (from sets) | — | Mar 30 – Apr 20 | Jun 28 |
| Garlic | — | Oct 3 – Oct 31 (fall) | following summer |
| Spinach | — | Mar 30 – Apr 27 | May 7 |
| Basil | Apr 7 – Apr 21 | May 19 – Jun 2 | Jul 15 |
Sherman'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 |
|---|---|
| 1938 | May 31 |
| 1939 | May 16 |
| 1942 | May 11 |
| 1946 | May 9 |
| 1947 | May 11 |
| 1948 | Apr 29 |
| 1949 | Apr 29 |
| 1950 | May 9 |
| 1951 | Apr 24 |
| 1952 | May 3 |
| 1953 | Apr 22 |
| 1954 | Apr 13 |
| 1955 | May 10 |
| 1956 | May 25 |
| 1957 | Apr 16 |
| 1958 | Apr 11 |
| 1959 | Apr 24 |
| 1960 | May 2 |
| 1961 | May 1 |
| 1962 | Apr 21 |
| 1963 | May 24 |
| 1964 | May 3 |
| 1965 | Apr 25 |
| 1966 | May 11 |
| 1967 | May 13 |
| 1968 | Apr 29 |
| 1969 | Apr 21 |
| 1970 | May 7 |
| 1971 | Apr 25 |
| 1972 | May 11 |
| 1973 | Apr 15 |
| 1974 | May 8 |
| 1975 | Apr 23 |
| 1976 | May 13 |
| 1977 | May 9 |
| 1978 | May 5 |
| 1979 | Apr 21 |
| 1980 | Apr 19 |
| 1981 | May 9 |
| 1982 | Apr 15 |
| 1983 | May 18 |
| 1984 | May 18 |
| 1985 | May 9 |
| 1991 | Apr 19 |
| 1992 | Apr 15 |
| 1993 | Apr 28 |
| 1994 | May 28 |
| 1995 | Apr 25 |
| 1996 | May 15 |
| 1997 | Apr 22 |
| 1998 | Apr 29 |
| 2000 | Apr 14 |
| 2001 | Apr 27 |
| 2002 | May 21 |
| 2003 | Apr 18 |
| 2004 | Apr 10 |
| 2005 | Apr 17 |
| 2006 | Apr 11 |
| 2007 | Apr 11 |
| 2009 | May 19 |
| 2011 | Apr 22 |
| 2016 | Apr 15 |
| 2017 | Apr 9 |
| 2019 | Apr 29 |
| 2021 | Apr 4 |
| 2022 | Apr 18 |
| 2026 | Apr 21 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1938 | 128 |
| 1939 | 128 |
| 1946 | 146 |
| 1947 | 134 |
| 1948 | 140 |
| 1950 | 137 |
| 1951 | 158 |
| 1952 | 153 |
| 1953 | 154 |
| 1954 | 177 |
| 1955 | 165 |
| 1956 | 118 |
| 1957 | 164 |
| 1958 | 177 |
| 1959 | 174 |
| 1960 | 152 |
| 1961 | 156 |
| 1962 | 152 |
| 1963 | 122 |
| 1964 | 155 |
| 1965 | 155 |
| 1966 | 148 |
| 1967 | 162 |
| 1968 | 159 |
| 1969 | 177 |
| 1970 | 162 |
| 1971 | 193 |
| 1972 | 143 |
| 1973 | 186 |
| 1974 | 138 |
| 1975 | 162 |
| 1976 | 150 |
| 1977 | 154 |
| 1978 | 156 |
| 1979 | 151 |
| 1980 | 173 |
| 1981 | 153 |
| 1982 | 178 |
| 1983 | 155 |
| 1984 | 140 |
| 1985 | 155 |
| 1991 | 177 |
| 1992 | 168 |
| 1993 | 155 |
| 1994 | 130 |
| 1995 | 175 |
| 1996 | 141 |
| 1997 | 155 |
| 2000 | 191 |
| 2001 | 164 |
| 2002 | 146 |
| 2003 | 184 |
| 2004 | 207 |
| 2005 | 199 |
| 2006 | 185 |
| 2007 | 200 |
| 2016 | 182 |
| 2017 | 205 |
| 2019 | 186 |
| 2022 | 183 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1938 | 17.1 °C |
| 1939 | 17.3 °C |
| 1946 | 16.3 °C |
| 1947 | 16.6 °C |
| 1948 | 16.8 °C |
| 1950 | 15.6 °C |
| 1951 | 17.1 °C |
| 1952 | 17.7 °C |
| 1953 | 17.4 °C |
| 1954 | 16.8 °C |
| 1955 | 18.2 °C |
| 1956 | 15.9 °C |
| 1957 | 17.4 °C |
| 1958 | 16.6 °C |
| 1959 | 18.3 °C |
| 1960 | 17.4 °C |
| 1961 | 17.4 °C |
| 1962 | 16.7 °C |
| 1963 | 16.6 °C |
| 1964 | 17.2 °C |
| 1965 | 17.3 °C |
| 1966 | 17.0 °C |
| 1967 | 16.5 °C |
| 1968 | 17.6 °C |
| 1969 | 17.7 °C |
| 1970 | 17.6 °C |
| 1971 | 17.2 °C |
| 1972 | 16.9 °C |
| 1973 | 17.9 °C |
| 1974 | 17.1 °C |
| 1975 | 17.1 °C |
| 1976 | 17.2 °C |
| 1977 | 17.7 °C |
| 1978 | 16.7 °C |
| 1979 | 17.4 °C |
| 1980 | 18.0 °C |
| 1981 | 17.8 °C |
| 1982 | 16.7 °C |
| 1983 | 17.7 °C |
| 1984 | 16.7 °C |
| 1985 | 17.1 °C |
| 1991 | 19.5 °C |
| 1992 | 17.3 °C |
| 1993 | 18.8 °C |
| 1994 | 18.4 °C |
| 1995 | 17.6 °C |
| 1996 | 16.3 °C |
| 1997 | 16.8 °C |
| 2000 | 17.6 °C |
| 2001 | 18.7 °C |
| 2002 | 19.0 °C |
| 2003 | 18.0 °C |
| 2004 | 18.6 °C |
| 2005 | 19.3 °C |
| 2006 | 18.8 °C |
| 2007 | 18.8 °C |
| 2016 | 18.8 °C |
| 2017 | 18.3 °C |
| 2019 | 18.6 °C |
| 2022 | 18.9 °C |
| 2024 | 19.5 °C |
What this means for you: Since 1938, Sherman's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 6 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Danbury (NOAA GHCN-Daily). Years with too many missing days are left out.