Frost dates for 57197 — Sioux Falls, SD
Last spring frostApr 26median date
First fall frostOct 13median date
Growing season170 daysfrost-free
Hardiness zone5aZone 5a
How Sioux Falls compares
- In 8 years out of 10, the last spring frost in Sioux Falls falls between April 10 and May 9, a 29-day window. The first fall frost falls between September 28 and October 28.
- The median last frost is 10 days earlier than the South Dakota median of May 6.
- Its 170-day growing season is among the longest of the 363 South Dakota places with a regular frost season.
- The last frost is 7 days earlier than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 154 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 10 |
| 50% (median) | April 26 |
| 10% (safe for tender plants) | May 9 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 28 |
| 50% (median) | October 13 |
| 90% (late) | October 28 |
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 Sioux Falls, SD
Frost dates for 57197 — Sioux Falls, SD — last frost Apr 26, first frost Oct 13, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 1 to Feb 15Transplant outside: Mar 29 to Apr 12
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Sow outdoors: Mar 29 to May 3Plant for fall: Aug 18 to Sep 15
Start indoors: Mar 1 to Mar 15Transplant outside: Mar 29 to Apr 12Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 4 to Aug 25
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 15 to Mar 29Transplant outside: May 17 to May 31Sow outdoors: May 17 to May 31
Start indoors: Mar 15 to Mar 29Transplant outside: May 3 to May 17
Sow outdoors: Mar 15 to Apr 5Plant for fall: Jul 21 to Aug 11
Sow outdoors: Mar 15 to Apr 5Plant for fall: Aug 18 to Sep 8
Sow outdoors: Mar 22 to May 3Plant for fall: Sep 1 to Sep 22
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 17Sow outdoors: May 3 to May 17Plant for fall: Jul 28 to Aug 11
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17Plant for fall: Aug 4 to Aug 18
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Apr 5 to May 3Plant for fall: Jul 21 to Aug 4
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 5 to Apr 26
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 12 to May 3Plant for fall: Aug 18 to Sep 8
Sow outdoors: May 3 to May 24Plant for fall: Jul 28 to Aug 11
Sow outdoors: May 3 to May 17
Transplant outside: May 10 to May 31
Plant for fall: Sep 29 to Nov 3
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Sioux Falls, SD
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 1 – Feb 15 | Mar 29 – Apr 12 | — | — |
| Peppers | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Eggplant | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Tomatoes | Mar 1 – Mar 15 | May 3 – May 17 | — | — |
| Lettuce | Mar 1 – Mar 15 | Apr 5 – Apr 19 | Mar 29 – May 3 | Aug 18 – Sep 15 |
| Kale | Mar 1 – Mar 15 | Mar 29 – Apr 12 | Mar 29 – Apr 12 | Aug 4 – Aug 25 |
| Broccoli | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 7 – Jul 28 |
| Cabbage | Mar 1 – Mar 15 | Apr 5 – Apr 19 | — | Jul 7 – Jul 28 |
| Cauliflower | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 7 – Jul 28 |
| Okra | Mar 15 – Mar 29 | May 17 – May 31 | May 17 – May 31 | — |
| Basil | Mar 15 – Mar 29 | May 3 – May 17 | — | — |
| Peas | — | — | Mar 15 – Apr 5 | Jul 21 – Aug 11 |
| Spinach | — | — | Mar 15 – Apr 5 | Aug 18 – Sep 8 |
| Radishes | — | — | Mar 22 – May 3 | Sep 1 – Sep 22 |
| Cucumbers | Mar 29 – Apr 5 | May 10 – May 17 | May 3 – May 17 | Jul 28 – Aug 11 |
| Zucchini & Summer Squash | Mar 29 – Apr 5 | — | May 3 – May 17 | Aug 4 – Aug 18 |
| Winter Squash & Pumpkins | Mar 29 – Apr 5 | — | May 3 – May 17 | — |
| Melons & Watermelon | Mar 29 – Apr 5 | May 10 – May 24 | — | — |
| Carrots | — | — | Apr 5 – May 3 | Jul 21 – Aug 4 |
| Beets | — | — | Apr 5 – May 3 | Aug 4 – Aug 18 |
| Potatoes | — | — | Apr 5 – Apr 26 | — |
| Swiss Chard | — | — | Apr 12 – May 10 | Aug 4 – Aug 18 |
| Cilantro | — | — | Apr 12 – May 3 | Aug 18 – Sep 8 |
| Green Beans | — | — | May 3 – May 24 | Jul 28 – Aug 11 |
| Sweet Corn | — | — | May 3 – May 17 | — |
| Sweet Potatoes | — | May 10 – May 31 | — | — |
| Garlic | — | — | — | Sep 29 – Nov 3 |
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 Sioux Falls Wfo Ap, SD weather station, 11 km away (elevation 1,430 ft (436 m)).
ZIP codes in Sioux Falls: 57101 57103 57104 57105 57106 57107 57108 57109 57110 57117 57118 57186 57193 57197 57198
Frost dates near Sioux Falls
- Crooks Apr 26 · Oct 13
- Baltic May 1 · Oct 4
- Renner May 1 · Oct 6
- Lyons Apr 26 · Oct 13
- Hartford Apr 26 · Oct 13
- Dell Rapids May 1 · Oct 4
- Brandon May 1 · Oct 6
- Colton May 3 · Oct 4
Frequently asked questions
When is the last frost in Sioux Falls, SD?
The median last spring frost in Sioux Falls, SD is April 26. There is still about a 10% chance of frost after May 9, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sioux Falls, SD?
The median first fall frost is October 13, with about a 10% chance of frost before September 28.
How long is the growing season in Sioux Falls, SD?
About 170 days between the median last spring frost and first fall frost.
What planting zone is Sioux Falls, SD?
Sioux Falls, SD is in USDA hardiness zone 5a.