Frost dates for Brookings, South Dakota
In a typical year, Brookings’s last spring frost lands around May 6 and the first fall frost around Oct 1, a growing season of about 148 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 4b.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Apr 25 | Sep 17 |
| 50 percent | May 6 | Oct 1 |
| 90 percent | May 19 | Oct 13 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Brookings is typically around 69°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Brookings
- Radish (Cherry Belle)
- Bok choy (Toy Choi)
- Spinach (Space)
- Arugula (Astro)
- Lettuce (Black Seeded Simpson)
- Mustard greens (Red Giant)
- Tatsoi (Tatsoi)
- Swiss chard (Fordhook Giant)
Timing comes from the same temperature engine the app uses, run against Brookings’s normals for today.
Nearby cities
- Sioux Falls, SD (around Apr 26 to Oct 13)
- Aberdeen, SD (around May 7 to Sep 29)
- Sioux City, IA (around Apr 29 to Oct 7)
- Fargo, ND (around May 5 to Oct 3)
- Minneapolis, MN (around Apr 23 to Oct 16)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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