When to plant in Hyrum, UT
USDA Zone 6aHyrum, Utah frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6a, Hyrum gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Hyrum is now 6 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
LOGAN 5 SW EXP FARM · 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 Hyrum’s own odds, recorded at LOGAN 5 SW EXP FARM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 16 | May 31 | May 14 | Sep 4 | Sep 18 | Oct 2 |
| 32°F | May 29 | May 12 | Apr 30 | Sep 14 | Sep 28 | Oct 12 |
| 28°F | May 12 | Apr 28 | Apr 9 | Sep 26 | Oct 9 | Oct 24 |
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 Hyrum, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Hyrum planting FAQ
When is the last spring frost in Hyrum, UT?
Hyrum's average last spring frost falls near May 12 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Hyrum, UT?
Expect Hyrum's first fall frost near September 28 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Hyrum in?
Hyrum is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Hyrum?
Hyrum has about 139 frost-free days — a short growing season — between the average last spring frost (May 12) and first fall frost (September 28).
When should I plant tomatoes in Hyrum?
For Hyrum, sow tomatoes indoors about March 17–March 31 and move the seedlings out around May 19, after the last spring frost.
Never miss a window in Hyrum
An email when it’s time to start seeds, transplant, and sow — timed to Hyrum’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Logan · 12 km
- North Logan · 16 km
- Brigham City · 22 km
- Smithfield · 23 km
- Tremonton · 30 km
- Pleasant View · 37 km
- North Ogden · 37 km
- Ogden · 46 km
Frost dates recorded at LOGAN 5 SW EXP FARM, 5 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 Hyrum, UT — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00425194. Retrieved from https://blissgarden.com/utah/hyrum.