Last frost date in Brigham City, Utah

May 5

Average last frost in spring. In an early year (1 in 10) it's over by April 20; in a late year (1 in 10) it comes after May 29.

October 5

Average first frost in fall. 1 year in 10 it comes by September 20.

Source: NOAA U.S. Climate Normals 1991–2020, station Brigham City Waste Plt (USC00420928), 1.3 miles from Brigham City, elevation 4,240 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Brigham City, Utah
Early yearAverageLate year
Last frost in springApr 20May 5May 29
First frost in fallSept 20Oct 5Oct 19

An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.

Frost-free days in an average year: 150

Planting calendar for Brigham City

Fall planting

USDA dates for places whose average first freeze is about September 30 (Brigham City: October 5).

USDA lists chervil and chives, garlic, horseradish, leeks, onion plants, onion seed, onion sets, shallots as generally spring-planted here.

Spring planting

USDA dates for places whose average last freeze is about April 30 (Brigham City: May 5).

USDA lists chinese cabbage as generally fall-planted here.

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.

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