When to plant in Walworth, WI
Planting dates worked out from Walworth'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
May 7
about a 50% chance of a later one
Average first fall frost
Oct 7
1 year in 10 by Sep 27
Frost-free days
150
median, 1991–2020
Station used: Clinton Wwtp · 22.7 km away · station 282 m, town 304 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) | Mar 5 – Mar 12 | Apr 9 – Apr 23 | May 19 |
| Peas | — | Apr 4 – May 2 | May 29 |
| Bush beans | — | May 12 – Jun 2 | Jul 1 |
| Carrot | — | Apr 16 – May 28 | Jun 15 |
| Beet | — | Apr 14 – May 26 | Jun 3 |
| Potato | — | Apr 16 – May 7 | Jun 25 |
| Kale | Feb 28 – Mar 14 | Apr 11 – Apr 25 | May 24 |
| Broccoli | Feb 26 – Mar 12 | Apr 9 – Apr 30 | Jun 8 |
| 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) | — | Apr 9 – Apr 30 | Jul 8 |
| Garlic | — | Sep 23 – Oct 21 (fall) | following summer |
| Spinach | — | Apr 4 – May 2 | May 12 |
| Basil | Apr 7 – Apr 21 | May 19 – Jun 2 | Jul 15 |
Walworth'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 |
|---|---|
| 2002 | May 20 |
| 2003 | May 15 |
| 2004 | May 22 |
| 2005 | May 3 |
| 2006 | Apr 25 |
| 2007 | Apr 15 |
| 2008 | May 19 |
| 2009 | May 17 |
| 2010 | May 9 |
| 2011 | May 4 |
| 2012 | Apr 27 |
| 2013 | May 13 |
| 2014 | Apr 23 |
| 2015 | May 1 |
| 2016 | May 15 |
| 2017 | May 7 |
| 2020 | May 12 |
| 2021 | May 30 |
| 2022 | May 4 |
| 2023 | May 3 |
| 2024 | Apr 25 |
| 2025 | Apr 16 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 2002 | 144 |
| 2003 | 137 |
| 2004 | 131 |
| 2005 | 164 |
| 2006 | 168 |
| 2007 | 151 |
| 2008 | 137 |
| 2009 | 145 |
| 2010 | 147 |
| 2011 | 150 |
| 2012 | 148 |
| 2013 | 159 |
| 2014 | 164 |
| 2015 | 168 |
| 2016 | 150 |
| 2017 | 170 |
| 2020 | 145 |
| 2021 | 139 |
| 2022 | 147 |
| 2023 | 159 |
| 2024 | 173 |
| 2025 | 190 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 2002 | 18.0 °C |
| 2003 | 16.8 °C |
| 2004 | 16.4 °C |
| 2005 | 18.3 °C |
| 2006 | 17.6 °C |
| 2007 | 17.7 °C |
| 2008 | 16.9 °C |
| 2009 | 16.1 °C |
| 2010 | 18.4 °C |
| 2011 | 17.1 °C |
| 2012 | 18.3 °C |
| 2013 | 16.8 °C |
| 2014 | 16.5 °C |
| 2015 | 17.3 °C |
| 2016 | 17.9 °C |
| 2017 | 17.0 °C |
| 2021 | 17.8 °C |
| 2022 | 16.2 °C |
| 2023 | 17.0 °C |
| 2024 | 17.1 °C |
| 2025 | 17.8 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Clinton Wwtp (NOAA GHCN-Daily). Years with too many missing days are left out.