Thebes, IL frost dates
Last spring frostApr 5median date
First fall frostOct 25median date
Growing season203 daysfrost-free
Hardiness zone7aZone 7a
How Thebes compares
- In 8 years out of 10, the last spring frost in Thebes falls between March 19 and April 21, a 33-day window. The first fall frost falls between October 12 and November 6.
- The median last frost is 12 days earlier than the Illinois median of Apr 17.
- Its 203-day growing season is longer than 87% of the 1,287 Illinois places with a regular frost season (state median 187 days).
- The last frost is 11 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 90 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 19 |
| 50% (median) | April 5 |
| 10% (safe for tender plants) | April 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 12 |
| 50% (median) | October 25 |
| 90% (late) | November 6 |
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 Thebes, IL
Thebes, IL frost dates — last frost Apr 5, first frost Oct 25, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 11 to Jan 25Transplant outside: Mar 8 to Mar 22
Start indoors: Jan 25 to Feb 8Transplant outside: Apr 19 to May 3
Start indoors: Jan 25 to Feb 8Transplant outside: Apr 19 to May 3
Start indoors: Feb 8 to Feb 22Transplant outside: Apr 12 to Apr 26
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 15 to Mar 29Sow outdoors: Mar 8 to Apr 12Plant for fall: Aug 30 to Sep 27
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 8 to Mar 22Sow outdoors: Mar 8 to Mar 22Plant for fall: Aug 16 to Sep 6
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 22 to Apr 5Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 15 to Mar 29Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 8 to Feb 22Transplant outside: Mar 22 to Apr 5Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 26 to May 10Sow outdoors: Apr 26 to May 10
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 12 to Apr 26
Sow outdoors: Feb 22 to Mar 15Plant for fall: Aug 2 to Aug 23
Sow outdoors: Feb 22 to Mar 15Plant for fall: Aug 30 to Sep 20
Sow outdoors: Mar 1 to Apr 12Plant for fall: Sep 13 to Oct 4
Start indoors: Mar 8 to Mar 15Transplant outside: Apr 19 to Apr 26Sow outdoors: Apr 12 to Apr 26Plant for fall: Aug 9 to Aug 23
Start indoors: Mar 8 to Mar 15Sow outdoors: Apr 12 to Apr 26Plant for fall: Aug 16 to Aug 30
Start indoors: Mar 8 to Mar 15Sow outdoors: Apr 12 to Apr 26
Start indoors: Mar 8 to Mar 15Transplant outside: Apr 19 to May 3
Sow outdoors: Mar 15 to Apr 12Plant for fall: Aug 2 to Aug 16
Sow outdoors: Mar 15 to Apr 12Plant for fall: Aug 16 to Aug 30
Sow outdoors: Mar 15 to Apr 5
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 16 to Aug 30
Sow outdoors: Mar 22 to Apr 12Plant for fall: Aug 30 to Sep 20
Sow outdoors: Apr 12 to May 3Plant for fall: Aug 9 to Aug 23
Sow outdoors: Apr 12 to Apr 26
Transplant outside: Apr 19 to May 10
Plant for fall: Oct 11 to Nov 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Thebes, IL
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 11 – Jan 25 | Mar 8 – Mar 22 | — | — |
| Peppers | Jan 25 – Feb 8 | Apr 19 – May 3 | — | — |
| Eggplant | Jan 25 – Feb 8 | Apr 19 – May 3 | — | — |
| Tomatoes | Feb 8 – Feb 22 | Apr 12 – Apr 26 | — | — |
| Lettuce | Feb 8 – Feb 22 | Mar 15 – Mar 29 | Mar 8 – Apr 12 | Aug 30 – Sep 27 |
| Kale | Feb 8 – Feb 22 | Mar 8 – Mar 22 | Mar 8 – Mar 22 | Aug 16 – Sep 6 |
| Broccoli | Feb 8 – Feb 22 | Mar 22 – Apr 5 | — | Jul 19 – Aug 9 |
| Cabbage | Feb 8 – Feb 22 | Mar 15 – Mar 29 | — | Jul 19 – Aug 9 |
| Cauliflower | Feb 8 – Feb 22 | Mar 22 – Apr 5 | — | Jul 19 – Aug 9 |
| Okra | Feb 22 – Mar 8 | Apr 26 – May 10 | Apr 26 – May 10 | — |
| Basil | Feb 22 – Mar 8 | Apr 12 – Apr 26 | — | — |
| Peas | — | — | Feb 22 – Mar 15 | Aug 2 – Aug 23 |
| Spinach | — | — | Feb 22 – Mar 15 | Aug 30 – Sep 20 |
| Radishes | — | — | Mar 1 – Apr 12 | Sep 13 – Oct 4 |
| Cucumbers | Mar 8 – Mar 15 | Apr 19 – Apr 26 | Apr 12 – Apr 26 | Aug 9 – Aug 23 |
| Zucchini & Summer Squash | Mar 8 – Mar 15 | — | Apr 12 – Apr 26 | Aug 16 – Aug 30 |
| Winter Squash & Pumpkins | Mar 8 – Mar 15 | — | Apr 12 – Apr 26 | — |
| Melons & Watermelon | Mar 8 – Mar 15 | Apr 19 – May 3 | — | — |
| Carrots | — | — | Mar 15 – Apr 12 | Aug 2 – Aug 16 |
| Beets | — | — | Mar 15 – Apr 12 | Aug 16 – Aug 30 |
| Potatoes | — | — | Mar 15 – Apr 5 | — |
| Swiss Chard | — | — | Mar 22 – Apr 19 | Aug 16 – Aug 30 |
| Cilantro | — | — | Mar 22 – Apr 12 | Aug 30 – Sep 20 |
| Green Beans | — | — | Apr 12 – May 3 | Aug 9 – Aug 23 |
| Sweet Corn | — | — | Apr 12 – Apr 26 | — |
| Sweet Potatoes | — | Apr 19 – May 10 | — | — |
| Garlic | — | — | — | Oct 11 – Nov 15 |
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 Cape Girardeau Muni Ap, MO weather station, 10 km away (elevation 335 ft (102 m)).
Frost dates near Thebes
- Mc Clure Apr 5 · Oct 25
- Olive Branch Apr 5 · Oct 25
- Unity Apr 2 · Oct 31
- Tamms Apr 3 · Nov 5
- Miller City Apr 2 · Oct 31
- Millcreek Apr 8 · Oct 29
- Pulaski Apr 3 · Nov 5
- Ullin Apr 3 · Nov 5
- Villa Ridge Apr 2 · Oct 31
- Mounds Apr 2 · Oct 31
Frequently asked questions
When is the last frost in Thebes, IL?
The median last spring frost in Thebes, IL is April 5. There is still about a 10% chance of frost after April 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Thebes, IL?
The median first fall frost is October 25, with about a 10% chance of frost before October 12.
How long is the growing season in Thebes, IL?
About 203 days between the median last spring frost and first fall frost.
What planting zone is Thebes, IL?
Thebes, IL is in USDA hardiness zone 7a.