When to plant in Brigham City, UT
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Brigham City, Utah — is derived from the closest NOAA station with complete climate normals.
Zone 6b means Brigham City sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average last spring frost in Brigham City is now 9 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
BRIGHAM CITY WASTE PLT · 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 Brigham City’s own odds, recorded at BRIGHAM CITY WASTE PLT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 11 | May 23 | May 5 | Sep 9 | Sep 24 | Oct 8 |
| 32°F | May 29 | May 5 | Apr 20 | Sep 20 | Oct 5 | Oct 19 |
| 28°F | May 5 | Apr 18 | Mar 31 | Oct 1 | Oct 17 | Nov 1 |
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 Brigham City, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 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.
Brigham City planting FAQ
When is the last spring frost in Brigham City, UT?
On average, the last spring frost in Brigham City is around May 5 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Brigham City, UT?
The first fall frost in Brigham City typically arrives around October 5 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Brigham City in?
Brigham City is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Brigham City?
There are roughly 153 frost-free days in Brigham City (a moderate growing season), running from the average last frost around May 5 to the first fall frost near October 5.
When should I plant tomatoes in Brigham City?
In Brigham City, start tomato seeds indoors around March 10–March 24, then transplant seedlings outdoors around May 12 once the danger of frost has passed.
Never miss a window in Brigham City
An email when it’s time to start seeds, transplant, and sow — timed to Brigham City’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Pleasant View · 21 km
- Hyrum · 22 km
- North Ogden · 23 km
- Tremonton · 26 km
- Logan · 31 km
- Ogden · 32 km
- West Haven · 33 km
- North Logan · 36 km
Frost dates recorded at BRIGHAM CITY WASTE PLT, 2 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 Brigham City, UT — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00420928. Retrieved from https://blissgarden.com/utah/brigham-city.