When to plant in Elroy, WI
Planting dates worked out from Elroy's own frost records, not a generic zone chart.
Safe to plant out
May 21
1 year in 10 has a later frost
Average last frost
May 7
about a 50% chance of a later one
Average first fall frost
Oct 3
1 year in 10 by Sep 23
Frost-free days
145
median, 1991–2020
Station used: Hillsboro · 10.8 km away · station 286 m, town 298 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 26 – Apr 9 | May 21 – Jun 4 | Jul 15 |
| Sweet pepper | Mar 12 – Mar 26 | May 21 – Jun 4 | Jul 20 |
| Lettuce (leaf) | Mar 5 – Mar 12 | Apr 9 – Apr 23 | May 19 |
| Peas | — | Apr 8 – May 6 | Jun 2 |
| Bush beans | — | May 14 – Jun 4 | Jul 3 |
| Carrot | — | Apr 18 – May 30 | Jun 17 |
| Beet | — | Apr 18 – May 30 | Jun 7 |
| Potato | — | Apr 18 – May 9 | Jun 27 |
| Kale | Mar 4 – Mar 18 | Apr 15 – Apr 29 | May 28 |
| Broccoli | Feb 26 – Mar 12 | Apr 9 – Apr 30 | Jun 8 |
| Cucumber | Apr 23 – Apr 30 | May 21 – Jun 4 | Jul 10 |
| Summer squash and zucchini | Apr 23 – Apr 30 | May 21 – Jun 4 | Jul 5 |
| Winter squash | Apr 23 – Apr 30 | May 21 – Jun 4 | Aug 9 |
| Sweet corn | — | May 14 – Jun 4 | Jul 13 |
| Onion (from sets) | — | Apr 9 – Apr 30 | Jul 8 |
| Garlic | — | Sep 19 – Oct 17 (fall) | following summer |
| Spinach | — | Apr 8 – May 6 | May 16 |
| Basil | Apr 9 – Apr 23 | May 21 – Jun 4 | Jul 17 |
Elroy'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 |
|---|---|
| 1960 | May 13 |
| 1961 | May 26 |
| 1962 | Apr 20 |
| 1963 | May 23 |
| 1964 | Jun 4 |
| 1965 | May 30 |
| 1966 | May 31 |
| 1967 | May 22 |
| 1968 | May 6 |
| 1969 | May 12 |
| 1970 | Apr 22 |
| 1971 | May 31 |
| 1972 | Jun 10 |
| 1973 | May 17 |
| 1974 | May 13 |
| 1975 | Apr 28 |
| 1976 | May 25 |
| 1977 | May 10 |
| 1979 | May 25 |
| 1980 | May 9 |
| 1981 | May 19 |
| 1982 | Apr 29 |
| 1983 | May 25 |
| 1984 | May 28 |
| 1985 | May 1 |
| 1986 | May 2 |
| 1987 | May 4 |
| 1988 | May 24 |
| 1989 | May 11 |
| 1990 | May 10 |
| 1991 | May 2 |
| 1992 | May 26 |
| 1993 | May 17 |
| 1994 | May 6 |
| 1995 | May 6 |
| 1996 | May 13 |
| 1997 | May 21 |
| 1998 | Apr 28 |
| 1999 | Apr 26 |
| 2000 | May 19 |
| 2001 | Apr 18 |
| 2002 | May 21 |
| 2003 | May 21 |
| 2004 | May 15 |
| 2005 | May 5 |
| 2006 | May 6 |
| 2007 | Apr 16 |
| 2008 | May 5 |
| 2009 | Apr 17 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1960 | 142 |
| 1961 | 122 |
| 1962 | 152 |
| 1963 | 112 |
| 1964 | 100 |
| 1966 | 106 |
| 1967 | 110 |
| 1968 | 149 |
| 1972 | 111 |
| 1975 | 149 |
| 1979 | 132 |
| 1980 | 139 |
| 1982 | 143 |
| 1983 | 119 |
| 1984 | 119 |
| 1985 | 145 |
| 1986 | 155 |
| 1987 | 150 |
| 1988 | 130 |
| 1989 | 134 |
| 1990 | 152 |
| 1991 | 139 |
| 1992 | 119 |
| 1993 | 135 |
| 1994 | 156 |
| 1995 | 139 |
| 1996 | 142 |
| 1997 | 145 |
| 1998 | 163 |
| 1999 | 159 |
| 2000 | 139 |
| 2001 | 159 |
| 2002 | 138 |
| 2003 | 130 |
| 2004 | 136 |
| 2005 | 155 |
| 2006 | 152 |
| 2007 | 191 |
| 2008 | 151 |
| 2009 | 165 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1959 | 17.9 °C |
| 1960 | 16.5 °C |
| 1961 | 16.2 °C |
| 1962 | 16.5 °C |
| 1963 | 16.6 °C |
| 1964 | 17.0 °C |
| 1965 | 15.8 °C |
| 1966 | 15.9 °C |
| 1967 | 15.2 °C |
| 1968 | 16.3 °C |
| 1972 | 16.2 °C |
| 1974 | 15.9 °C |
| 1975 | 16.6 °C |
| 1977 | 18.4 °C |
| 1979 | 16.0 °C |
| 1980 | 17.0 °C |
| 1982 | 15.2 °C |
| 1983 | 16.3 °C |
| 1984 | 16.1 °C |
| 1985 | 17.0 °C |
| 1986 | 16.4 °C |
| 1987 | 17.3 °C |
| 1988 | 17.7 °C |
| 1989 | 15.3 °C |
| 1990 | 16.0 °C |
| 1991 | 16.8 °C |
| 1992 | 14.4 °C |
| 1993 | 14.8 °C |
| 1994 | 15.9 °C |
| 1995 | 16.2 °C |
| 1996 | 14.9 °C |
| 1997 | 15.1 °C |
| 1998 | 17.3 °C |
| 1999 | 16.9 °C |
| 2000 | 16.3 °C |
| 2001 | 17.0 °C |
| 2002 | 16.7 °C |
| 2003 | 16.3 °C |
| 2004 | 15.7 °C |
| 2005 | 17.6 °C |
| 2006 | 17.2 °C |
| 2007 | 17.4 °C |
| 2008 | 16.5 °C |
| 2009 | 16.0 °C |
| 2010 | 17.9 °C |
What this means for you: Since 1960, Elroy's last spring frost has come about 4 days earlier per decade, on average. The frost-free season has grown by about 7 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Hillsboro (NOAA GHCN-Daily). Years with too many missing days are left out.