Last frost date in Belgrade, Montana

May 26

Average last frost in spring. In an early year (1 in 10) it's over by May 11; in a late year (1 in 10) it comes after June 12.

September 16

Average first frost in fall. 1 year in 10 it comes by September 2.

Source: NOAA U.S. Climate Normals 1991–2020, station Bozeman Gallatin Fld (USW00024132), 1 miles from Belgrade, elevation 4,427 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Belgrade, Montana
Early yearAverageLate year
Last frost in springMay 11May 26June 12
First frost in fallSept 2Sept 16Sept 29

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: 112

Planting calendar for Belgrade

Fall planting

USDA dates for places whose average first freeze is about September 20 (Belgrade: September 16).

USDA lists garlic, horseradish, leeks, onion plants, onion seed, onion sets, shallots as generally spring-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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