Williamsville, MO frost dates
Last spring frostApr 2median date
First fall frostNov 2median date
Growing season214 daysfrost-free
Hardiness zone7aZone 7a
How Williamsville compares
- In 8 years out of 10, the last spring frost in Williamsville falls between March 16 and April 18, a 33-day window. The first fall frost falls between October 21 and November 18.
- The median last frost is 10 days earlier than the Missouri median of Apr 12.
- Its 214-day growing season is longer than 91% of the 938 Missouri places with a regular frost season (state median 195 days).
- The last frost is 14 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 92 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 16 |
| 50% (median) | April 2 |
| 10% (safe for tender plants) | April 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 21 |
| 50% (median) | November 2 |
| 90% (late) | November 18 |
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 Williamsville, MO
Williamsville, MO frost dates — last frost Apr 2, first frost Nov 2, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 8 to Jan 22Transplant outside: Mar 5 to Mar 19
Start indoors: Jan 22 to Feb 5Transplant outside: Apr 16 to Apr 30
Start indoors: Jan 22 to Feb 5Transplant outside: Apr 16 to Apr 30
Start indoors: Feb 5 to Feb 19Transplant outside: Apr 9 to Apr 23
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 12 to Mar 26Sow outdoors: Mar 5 to Apr 9Plant for fall: Sep 7 to Oct 5
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 5 to Mar 19Sow outdoors: Mar 5 to Mar 19Plant for fall: Aug 24 to Sep 14
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 19 to Apr 2Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 12 to Mar 26Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 19 to Apr 2Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 19 to Mar 5Transplant outside: Apr 23 to May 7Sow outdoors: Apr 23 to May 7
Start indoors: Feb 19 to Mar 5Transplant outside: Apr 9 to Apr 23
Sow outdoors: Feb 19 to Mar 12Plant for fall: Aug 10 to Aug 31
Sow outdoors: Feb 19 to Mar 12Plant for fall: Sep 7 to Sep 28
Sow outdoors: Feb 26 to Apr 9Plant for fall: Sep 21 to Oct 12
Start indoors: Mar 5 to Mar 12Transplant outside: Apr 16 to Apr 23Sow outdoors: Apr 9 to Apr 23Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 5 to Mar 12Sow outdoors: Apr 9 to Apr 23Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 5 to Mar 12Sow outdoors: Apr 9 to Apr 23
Start indoors: Mar 5 to Mar 12Transplant outside: Apr 16 to Apr 30
Sow outdoors: Mar 12 to Apr 9Plant for fall: Aug 10 to Aug 24
Sow outdoors: Mar 12 to Apr 9Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 12 to Apr 2
Sow outdoors: Mar 19 to Apr 16Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 19 to Apr 9Plant for fall: Sep 7 to Sep 28
Sow outdoors: Apr 9 to Apr 30Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 9 to Apr 23
Transplant outside: Apr 16 to May 7
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Williamsville, MO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 8 – Jan 22 | Mar 5 – Mar 19 | — | — |
| Peppers | Jan 22 – Feb 5 | Apr 16 – Apr 30 | — | — |
| Eggplant | Jan 22 – Feb 5 | Apr 16 – Apr 30 | — | — |
| Tomatoes | Feb 5 – Feb 19 | Apr 9 – Apr 23 | — | — |
| Lettuce | Feb 5 – Feb 19 | Mar 12 – Mar 26 | Mar 5 – Apr 9 | Sep 7 – Oct 5 |
| Kale | Feb 5 – Feb 19 | Mar 5 – Mar 19 | Mar 5 – Mar 19 | Aug 24 – Sep 14 |
| Broccoli | Feb 5 – Feb 19 | Mar 19 – Apr 2 | — | Jul 27 – Aug 17 |
| Cabbage | Feb 5 – Feb 19 | Mar 12 – Mar 26 | — | Jul 27 – Aug 17 |
| Cauliflower | Feb 5 – Feb 19 | Mar 19 – Apr 2 | — | Jul 27 – Aug 17 |
| Okra | Feb 19 – Mar 5 | Apr 23 – May 7 | Apr 23 – May 7 | — |
| Basil | Feb 19 – Mar 5 | Apr 9 – Apr 23 | — | — |
| Peas | — | — | Feb 19 – Mar 12 | Aug 10 – Aug 31 |
| Spinach | — | — | Feb 19 – Mar 12 | Sep 7 – Sep 28 |
| Radishes | — | — | Feb 26 – Apr 9 | Sep 21 – Oct 12 |
| Cucumbers | Mar 5 – Mar 12 | Apr 16 – Apr 23 | Apr 9 – Apr 23 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Mar 5 – Mar 12 | — | Apr 9 – Apr 23 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Mar 5 – Mar 12 | — | Apr 9 – Apr 23 | — |
| Melons & Watermelon | Mar 5 – Mar 12 | Apr 16 – Apr 30 | — | — |
| Carrots | — | — | Mar 12 – Apr 9 | Aug 10 – Aug 24 |
| Beets | — | — | Mar 12 – Apr 9 | Aug 24 – Sep 7 |
| Potatoes | — | — | Mar 12 – Apr 2 | — |
| Swiss Chard | — | — | Mar 19 – Apr 16 | Aug 24 – Sep 7 |
| Cilantro | — | — | Mar 19 – Apr 9 | Sep 7 – Sep 28 |
| Green Beans | — | — | Apr 9 – Apr 30 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | Apr 9 – Apr 23 | — |
| Sweet Potatoes | — | Apr 16 – May 7 | — | — |
| Garlic | — | — | — | Oct 19 – Nov 23 |
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 Wappapello Dam, MO weather station, 19 km away (elevation 410 ft (125 m)).
Frost dates near Williamsville
- Greenville Apr 2 · Nov 2
- Lodi Apr 2 · Nov 2
- Mc Gee Apr 2 · Nov 2
- Wappapello Apr 2 · Nov 2
- Mill Spring Apr 9 · Oct 26
- Rombauer Mar 31 · Oct 31
- Ellsinore Apr 9 · Oct 26
- Patterson Apr 9 · Oct 26
- Poplar Bluff Mar 29 · Nov 5
- Silva Apr 9 · Oct 26
Frequently asked questions
When is the last frost in Williamsville, MO?
The median last spring frost in Williamsville, MO is April 2. There is still about a 10% chance of frost after April 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Williamsville, MO?
The median first fall frost is November 2, with about a 10% chance of frost before October 21.
How long is the growing season in Williamsville, MO?
About 214 days between the median last spring frost and first fall frost.
What planting zone is Williamsville, MO?
Williamsville, MO is in USDA hardiness zone 7a.