When to plant in Laramie, WY
USDA Zone 4aLaramie, Wyoming frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
A ~89-day frost-free window makes Laramie a short-season garden: choose early varieties and start long-season crops indoors well ahead of the last frost. Zone 4a is cold — in Laramie, most perennials must be fully hardy, and your frost dates set a tight window for tender annual vegetables.
Frost probability
LARAMIE 2 NW · 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 Laramie’s own odds, recorded at LARAMIE 2 NW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 32°F | Jun 29 | Jun 7 | May 23 | Aug 17 | Sep 4 | Sep 18 |
| 28°F | Jun 6 | May 22 | May 9 | Sep 2 | Sep 14 | Sep 29 |
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 Laramie, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 7 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.
Laramie planting FAQ
When is the last spring frost in Laramie, WY?
Plan for the last spring frost in Laramie around June 7 (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 Laramie, WY?
In Laramie, the first 32°F freeze of fall lands around September 4 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Laramie in?
Laramie is in USDA hardiness zone 4a. In zone 4a, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Laramie?
There are roughly 89 frost-free days in Laramie (a short growing season), running from the average last frost around June 7 to the first fall frost near September 4.
When should I plant tomatoes in Laramie?
In Laramie, start tomato seeds indoors around April 12–April 26, then transplant seedlings outdoors around June 14 once the danger of frost has passed.
Never miss a window in Laramie
An email when it’s time to start seeds, transplant, and sow — timed to Laramie’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Cheyenne · 71 km
- Wellington · 85 km
- Fort Collins · 96 km
- Severance · 109 km
- Windsor · 109 km
- Loveland · 109 km
- Greeley · 122 km
- Johnstown · 126 km
Frost dates recorded at LARAMIE 2 NW, 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 Laramie, WY — Frost Dates & Zone 4a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00485435. Retrieved from https://blissgarden.com/wyoming/laramie.