Last frost date in Alpine, Utah

May 3

Average last frost in spring. In an early year (1 in 10) it's over by April 18; in a late year (1 in 10) it comes after May 26.

October 12

Average first frost in fall. 1 year in 10 it comes by September 29.

Source: NOAA U.S. Climate Normals 1991–2020, station Alpine (USC00420061), 0.1 miles from Alpine, elevation 5,100 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Alpine, Utah
Early yearAverageLate year
Last frost in springApr 18May 3May 26
First frost in fallSept 29Oct 12Oct 26

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: 159

Planting calendar for Alpine

Fall planting

USDA dates for places whose average first freeze is about October 10 (Alpine: October 12).

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

Spring planting

USDA dates for places whose average last freeze is about April 30 (Alpine: May 3).

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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