Frost dates for Gillette, Wyoming
In a typical year, Gillette’s last spring frost lands around May 15 and the first fall frost around Oct 1, a growing season of about 139 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 5a.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | May 1 | Sep 15 |
| 50 percent | May 15 | Oct 1 |
| 90 percent | May 27 | Oct 14 |
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 Gillette is typically around 71°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Gillette
- Bok choy (Toy Choi)
- Arugula (Astro)
- Mustard greens (Red Giant)
- Tatsoi (Tatsoi)
- Dill (Bouquet)
- Cilantro (Santo)
- Sweet alyssum (Snow Crystals)
- Mâche (Vit)
Timing comes from the same temperature engine the app uses, run against Gillette’s normals for today.
Nearby cities
- Casper, WY (around May 10 to Sep 29)
- Rapid City, SD (around May 10 to Oct 5)
- Billings, MT (around May 10 to Oct 1)
- Laramie, WY (around Jun 7 to Sep 4)
- Cheyenne, WY (around May 14 to Oct 1)
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.
Set up your garden