When to plant in Cheyenne, WY
USDA Zone 5bCheyenne, Wyoming frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 5b, Cheyenne gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
CHEYENNE WFO · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Cheyenne’s own odds, recorded at CHEYENNE WFO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 7 | May 26 | May 13 | Sep 11 | Sep 24 | Oct 5 |
| 32°F | May 28 | May 14 | May 3 | Sep 17 | Oct 1 | Oct 14 |
| 28°F | May 17 | May 3 | Apr 20 | Sep 27 | Oct 10 | Oct 23 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Cheyenne, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Cheyenne planting FAQ
When is the last spring frost in Cheyenne, WY?
Plan for the last spring frost in Cheyenne around May 14 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Cheyenne, WY?
Expect Cheyenne's first fall frost near October 1 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Cheyenne in?
Cheyenne is in USDA hardiness zone 5b. In zone 5b, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Cheyenne?
Cheyenne has about 140 frost-free days — a short growing season — between the average last spring frost (May 14) and first fall frost (October 1).
When should I plant tomatoes in Cheyenne?
For Cheyenne, sow tomatoes indoors about March 19–April 2 and move the seedlings out around May 21, after the last spring frost.
Never miss a window in Cheyenne
An email when it’s time to start seeds, transplant, and sow — timed to Cheyenne’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Wellington · 51 km
- Fort Collins · 68 km
- Severance · 69 km
- Laramie · 71 km
- Windsor · 73 km
- Greeley · 79 km
- Loveland · 82 km
- Evans · 87 km
Frost dates recorded at CHEYENNE WFO, 3 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Cheyenne, WY — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00481676. Retrieved from https://blissgarden.com/wyoming/cheyenne.