What Growing Zone Is 59457?

Our records indicate the United States Department of Agriculture has given zip code 59457 a growing zone designation of 4b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in zip code 59457's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used weather data from 1991 - 2020 in their analysis.

Latest Montana growing zone map

If you are looking for plants suitable for growing in zip code 59457, head on over to our page on plants that grow well in Lewistown, Montana.

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Latest Montana growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since zip code 59457 is in growing zone 4b this means that plants there can survive temperatures as low as -25 to -20 degrees Fahrenheit. Plants for zip code 59457's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.

Some zones may have been changed by the USDA as of 2023. To see if zip code 59457 has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That's not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

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Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection for zip code 59457.

The USDA hardiness zone is 4b for zip code 59457. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

59457's Growing Zone Details

USDA Growing Zone: 4b

Zip Codes:

59457

Longitude: -109.38656

Latitude: 47.08027

Lowest Avg Temperatures (F): -25 to -20

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Map of the 59457 Area

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Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.

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