Joppa, IL frost dates
Last spring frostApr 3median date
First fall frostOct 27median date
Growing season207 daysfrost-free
Hardiness zone7aZone 7a
How Joppa compares
- In 8 years out of 10, the last spring frost in Joppa falls between March 18 and April 20, a 33-day window. The first fall frost falls between October 15 and November 8.
- The median last frost is 14 days earlier than the Illinois median of Apr 17.
- Its 207-day growing season is longer than 95% of the 1,287 Illinois places with a regular frost season (state median 187 days).
- The last frost is 13 days earlier than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 84 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 18 |
| 50% (median) | April 3 |
| 10% (safe for tender plants) | April 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 15 |
| 50% (median) | October 27 |
| 90% (late) | November 8 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Joppa, IL
Joppa, IL frost dates — last frost Apr 3, first frost Oct 27, zone 7a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Jan 9 to Jan 23Transplant outside: Mar 6 to Mar 20
Start indoors: Jan 23 to Feb 6Transplant outside: Apr 17 to May 1
Start indoors: Jan 23 to Feb 6Transplant outside: Apr 17 to May 1
Start indoors: Feb 6 to Feb 20Transplant outside: Apr 10 to Apr 24
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 13 to Mar 27Sow outdoors: Mar 6 to Apr 10Plant for fall: Sep 1 to Sep 29
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 6 to Mar 20Sow outdoors: Mar 6 to Mar 20Plant for fall: Aug 18 to Sep 8
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 20 to Apr 3Plant for fall: Jul 21 to Aug 11
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 13 to Mar 27Plant for fall: Jul 21 to Aug 11
Start indoors: Feb 6 to Feb 20Transplant outside: Mar 20 to Apr 3Plant for fall: Jul 21 to Aug 11
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 24 to May 8Sow outdoors: Apr 24 to May 8
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 10 to Apr 24
Sow outdoors: Feb 20 to Mar 13Plant for fall: Aug 4 to Aug 25
Sow outdoors: Feb 20 to Mar 13Plant for fall: Sep 1 to Sep 22
Sow outdoors: Feb 27 to Apr 10Plant for fall: Sep 15 to Oct 6
Start indoors: Mar 6 to Mar 13Transplant outside: Apr 17 to Apr 24Sow outdoors: Apr 10 to Apr 24Plant for fall: Aug 11 to Aug 25
Start indoors: Mar 6 to Mar 13Sow outdoors: Apr 10 to Apr 24Plant for fall: Aug 18 to Sep 1
Start indoors: Mar 6 to Mar 13Sow outdoors: Apr 10 to Apr 24
Start indoors: Mar 6 to Mar 13Transplant outside: Apr 17 to May 1
Sow outdoors: Mar 13 to Apr 10Plant for fall: Aug 4 to Aug 18
Sow outdoors: Mar 13 to Apr 10Plant for fall: Aug 18 to Sep 1
Sow outdoors: Mar 13 to Apr 3
Sow outdoors: Mar 20 to Apr 17Plant for fall: Aug 18 to Sep 1
Sow outdoors: Mar 20 to Apr 10Plant for fall: Sep 1 to Sep 22
Sow outdoors: Apr 10 to May 1Plant for fall: Aug 11 to Aug 25
Sow outdoors: Apr 10 to Apr 24
Transplant outside: Apr 17 to May 8
Plant for fall: Oct 13 to Nov 17
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Joppa, IL
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 9 – Jan 23 | Mar 6 – Mar 20 | — | — |
| Peppers | Jan 23 – Feb 6 | Apr 17 – May 1 | — | — |
| Eggplant | Jan 23 – Feb 6 | Apr 17 – May 1 | — | — |
| Tomatoes | Feb 6 – Feb 20 | Apr 10 – Apr 24 | — | — |
| Lettuce | Feb 6 – Feb 20 | Mar 13 – Mar 27 | Mar 6 – Apr 10 | Sep 1 – Sep 29 |
| Kale | Feb 6 – Feb 20 | Mar 6 – Mar 20 | Mar 6 – Mar 20 | Aug 18 – Sep 8 |
| Broccoli | Feb 6 – Feb 20 | Mar 20 – Apr 3 | — | Jul 21 – Aug 11 |
| Cabbage | Feb 6 – Feb 20 | Mar 13 – Mar 27 | — | Jul 21 – Aug 11 |
| Cauliflower | Feb 6 – Feb 20 | Mar 20 – Apr 3 | — | Jul 21 – Aug 11 |
| Okra | Feb 20 – Mar 6 | Apr 24 – May 8 | Apr 24 – May 8 | — |
| Basil | Feb 20 – Mar 6 | Apr 10 – Apr 24 | — | — |
| Peas | — | — | Feb 20 – Mar 13 | Aug 4 – Aug 25 |
| Spinach | — | — | Feb 20 – Mar 13 | Sep 1 – Sep 22 |
| Radishes | — | — | Feb 27 – Apr 10 | Sep 15 – Oct 6 |
| Cucumbers | Mar 6 – Mar 13 | Apr 17 – Apr 24 | Apr 10 – Apr 24 | Aug 11 – Aug 25 |
| Zucchini & Summer Squash | Mar 6 – Mar 13 | — | Apr 10 – Apr 24 | Aug 18 – Sep 1 |
| Winter Squash & Pumpkins | Mar 6 – Mar 13 | — | Apr 10 – Apr 24 | — |
| Melons & Watermelon | Mar 6 – Mar 13 | Apr 17 – May 1 | — | — |
| Carrots | — | — | Mar 13 – Apr 10 | Aug 4 – Aug 18 |
| Beets | — | — | Mar 13 – Apr 10 | Aug 18 – Sep 1 |
| Potatoes | — | — | Mar 13 – Apr 3 | — |
| Swiss Chard | — | — | Mar 20 – Apr 17 | Aug 18 – Sep 1 |
| Cilantro | — | — | Mar 20 – Apr 10 | Sep 1 – Sep 22 |
| Green Beans | — | — | Apr 10 – May 1 | Aug 11 – Aug 25 |
| Sweet Corn | — | — | Apr 10 – Apr 24 | — |
| Sweet Potatoes | — | Apr 17 – May 8 | — | — |
| Garlic | — | — | — | Oct 13 – Nov 17 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the W Paducah 2w, KY weather station, 17 km away (elevation 413 ft (126 m)).
Frost dates near Joppa
- Metropolis Apr 6 · Oct 27
- Karnak Apr 3 · Nov 5
- Grand Chain Apr 3 · Nov 5
- Belknap Apr 3 · Nov 5
- Grantsburg Apr 14 · Oct 21
- Cypress Apr 3 · Nov 5
- Olmsted Apr 3 · Nov 5
- Vienna Apr 14 · Oct 21
- Perks Apr 3 · Nov 5
- Boles Apr 14 · Oct 21
Frequently asked questions
When is the last frost in Joppa, IL?
The median last spring frost in Joppa, IL is April 3. There is still about a 10% chance of frost after April 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Joppa, IL?
The median first fall frost is October 27, with about a 10% chance of frost before October 15.
How long is the growing season in Joppa, IL?
About 207 days between the median last spring frost and first fall frost.
What planting zone is Joppa, IL?
Joppa, IL is in USDA hardiness zone 7a.