Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 59542 — Turner, MT

ZIP code 59542 (Turner, Blaine County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 19 and the first fall frost September 21.

Where ZIP 59542 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone4a−30 to −25 °F

Coldest night−34.4 to −31.7 °C

Last frostMay 19

First frostSep 21

2012 zone3b

Was 3b on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Turner, MT…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Turner, MT

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 19median — 50% chance of a later frost

Safe for tender plantsJune 1only 10% chance of frost after

First fall frostSeptember 21median — 10% chance by Sep 8

Growing season124 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 9 and returns around September 30.

From the NOAA station Turner 11n, MT — 12 miles away, elevation 2,982 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 59542

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 7 – Apr 21

SpinachSow outdoors · Apr 7 – Apr 28

Broccoli, cabbageStart indoors · Mar 10 – Mar 24

Broccoli, cabbageTransplant · Apr 28 – May 12

Onion setsPlant outdoors · Apr 21 – May 5

PotatoesPlant outdoors · Apr 28 – May 12

LettuceSow outdoors · Apr 21 – May 5

Carrots, beetsSow outdoors · Apr 28 – May 12

TomatoesStart indoors · Mar 24 – Apr 7

TomatoesTransplant · May 26 – Jun 9

Peppers, eggplantStart indoors · Mar 10 – Mar 24

Peppers, eggplantTransplant · Jun 2 – Jun 16

BeansSow outdoors · May 26 – Jun 9

Sweet cornSow outdoors · May 26 – Jun 9

Cucumbers, squashSow outdoors · May 26 – Jun 9

Fall lettuce, spinachSow outdoors · Jul 27 – Aug 10

GarlicPlant cloves · Sep 7 – Oct 12

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 19) and first fall frost (Sep 21) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 59542 came on Apr 20 — about the same time as the 1991–2020 average (Apr 19).

average
Apr 192026
Apr 20

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Native plants for zone 4a in Montana

439 plants native to the lower 48 states, recorded in Montana, and rated by the USDA to survive −30 °F or colder — the bottom of zone 4a. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Turner, MT.

Soil in Turner, MT

The soil mapped at the center of ZIP 59542 is Telstad — loam, well drained.

TextureLoama good balance for most vegetables

pH7.0neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupCwater soaks in slowly

Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Telstad-Joplin loams, 0 to 4 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 59542; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Turner, MT

Summer high84 °Faverage high, August

Winter low5 °Faverage low, January

Hot days19days a year at 90 °F or more

Freezing nights190nights a year at 32 °F or less

Growing degree days1,925base 50 °F — the season’s usable heat

Longest day16 h 10 mindaylight on June 21

Shortest day8 h 15 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation12.3 inper year, rain and melted snow

Snowfall26 inper year; 87 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Turner 11n, MT (12 mi away); precipitation: Turner 11n, MT (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

5 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

Whitewater, MT · 36 mi

Montana planting zones →

Questions about 59542

What planting zone is ZIP code 59542?

ZIP code 59542 (Turner, MT) is in USDA hardiness zone 4a on the 2023 map: the coldest night of an average winter reaches −30 to −25 °F (−34.4 to −31.7 °C).

When is the last frost in Turner, MT?

The median last spring frost (32 °F) near 59542 is May 19; after June 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Turner 11n station.

When is the first frost in Turner, MT?

The median first fall frost near 59542 is September 21, giving a median frost-free growing season of 124 days.

When should I plant tomatoes in 59542?

Start tomato seeds indoors around Mar 24 – Apr 7 and set transplants outside around May 26 – Jun 9, one to three weeks after the median last frost.

How much rain and snow does 59542 get?

About 12.3 inches of precipitation a year and 26 inches of snowfall (NOAA 1991–2020 normals, Turner 11n station).

How hot do summers get in Turner, MT?

The average high peaks at 84 °F in August, with about 19 days a year at 90 °F or more.

What kind of soil does 59542 have?

The USDA soil survey maps Telstad at the center of ZIP 59542: loam, well drained, pH about 7.0 (neutral).

Did spring come early in Turner, MT in 2026?

Spring leaf-out near 59542 came on Apr 20 in 2026, about the same as the 1991–2020 average (Apr 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Turner, MT?

Long-day onions: the longest day near 59542 is 16 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 59542 change?

Yes. The 2012 USDA map put 59542 in zone 3b; the 2023 map puts it in zone 4a. The newer map uses 1991–2020 data and more weather stations.