When to plant in Sumner, IL
Planting dates worked out from Sumner's own frost records, not a generic zone chart.
Last spring frost
- Early · riskyMar 269 years in 10 still get a later frost
- TypicalApr 7about half of years get a later frost
- Safe to plant outApr 181 year in 10 gets a later frost
Hardy crops like peas and spinach are timed from the typical date. Wait for the safe date before planting out tomatoes, peppers and squash.
First fall frost
- EarlyOct 91 year in 10 has frost by then
- TypicalOct 25about half of years have had frost
- LateNov 99 years in 10 have had frost by then
A typical year has 198 frost-free days. Plan for tender crops to be ripe by the early date.
Station used: Lawrenceville 2wsw · 12.3 km away · station 138 m, town 139 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 | Feb 21 – Mar 7 | Apr 18 – May 2 | Jun 12 |
| Sweet pepper | Feb 7 – Feb 21 | Apr 18 – May 2 | Jun 17 |
| Lettuce (leaf) | Feb 5 – Feb 12 | Mar 12 – Mar 26 | Apr 21 |
| Peas | — | Mar 12 – Apr 9 | May 6 |
| Bush beans | — | Apr 11 – May 2 | May 31 |
| Carrot | — | Mar 22 – May 3 | May 21 |
| Beet | — | Mar 22 – May 3 | May 11 |
| Potato | — | Mar 22 – Apr 12 | May 31 |
| Kale | Feb 5 – Feb 19 | Mar 19 – Apr 2 | May 1 |
| Broccoli | Jan 29 – Feb 12 | Mar 12 – Apr 2 | May 11 |
| Cucumber | Mar 21 – Mar 28 | Apr 18 – May 2 | Jun 7 |
| Summer squash and zucchini | Mar 21 – Mar 28 | Apr 18 – May 2 | Jun 2 |
| Winter squash | Mar 21 – Mar 28 | Apr 18 – May 2 | Jul 7 |
| Sweet corn | — | Apr 11 – May 2 | Jun 10 |
| Onion (from sets) | — | Mar 12 – Apr 2 | Jun 10 |
| Garlic | — | Oct 11 – Nov 8 (fall) | following summer |
| Spinach | — | Mar 12 – Apr 9 | Apr 19 |
| Basil | Mar 7 – Mar 21 | Apr 18 – May 2 | Jun 14 |
Sumner'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 |
|---|---|
| 1963 | May 1 |
| 1991 | Mar 31 |
| 1992 | Apr 6 |
| 1993 | Apr 18 |
| 1994 | Apr 8 |
| 1995 | Apr 6 |
| 1996 | Apr 17 |
| 1997 | Apr 15 |
| 1998 | Mar 25 |
| 1999 | Mar 28 |
| 2000 | Apr 9 |
| 2001 | Apr 19 |
| 2005 | Mar 18 |
| 2009 | Mar 31 |
| 2010 | Mar 27 |
| 2016 | Apr 12 |
| 2017 | Apr 8 |
| 2018 | Apr 29 |
| 2021 | Apr 22 |
| 2022 | Apr 19 |
| 2023 | Apr 24 |
| 2024 | Apr 6 |
| 2025 | Apr 9 |
| 2026 | Mar 29 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1991 | 198 |
| 1992 | 194 |
| 1993 | 192 |
| 1994 | 199 |
| 1996 | 196 |
| 1997 | 189 |
| 1998 | 224 |
| 1999 | 209 |
| 2000 | 181 |
| 2001 | 190 |
| 2009 | 200 |
| 2010 | 223 |
| 2016 | 211 |
| 2017 | 200 |
| 2021 | 194 |
| 2022 | 172 |
| 2023 | 189 |
| 2024 | 193 |
| 2025 | 198 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1963 | 20.7 °C |
| 1991 | 22.1 °C |
| 1992 | 19.3 °C |
| 1993 | 20.5 °C |
| 1994 | 20.1 °C |
| 1996 | 20.1 °C |
| 1997 | 19.5 °C |
| 1998 | 21.4 °C |
| 1999 | 21.3 °C |
| 2001 | 21.2 °C |
| 2003 | 20.6 °C |
| 2005 | 21.4 °C |
| 2009 | 21.1 °C |
| 2010 | 22.9 °C |
| 2011 | 21.6 °C |
| 2016 | 21.0 °C |
| 2017 | 20.8 °C |
| 2018 | 22.4 °C |
| 2021 | 20.2 °C |
| 2022 | 20.3 °C |
| 2023 | 20.2 °C |
| 2024 | 21.1 °C |
| 2025 | 20.4 °C |
| 2026 | 21.5 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Lawrenceville 2wsw (NOAA GHCN-Daily). Years with too many missing days are left out.