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

Planting zone for 59082 — Springdale, MT

ZIP code 59082 (Springdale, Park County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 27 and the first fall frost September 14.

Where ZIP 59082 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.

Zone5a−20 to −15 °F
Coldest night−28.9 to −26.1 °C
Last frostMay 27
First frostSep 14
2012 zone4b

Was 4b 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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Springdale, 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 Springdale, MT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 27median — 50% chance of a later frost
Safe for tender plantsJune 14only 10% chance of frost after
First fall frostSeptember 14median — 10% chance by Aug 27
Growing season108 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 13 and returns around September 26.

From the NOAA station Livingston Mission Field, MT — 12 miles away, elevation 4,643 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 59082

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 15 – Apr 29
SpinachSow outdoors · Apr 15 – May 6
Broccoli, cabbageStart indoors · Mar 18 – Apr 1
Broccoli, cabbageTransplant · May 6 – May 20
Onion setsPlant outdoors · Apr 29 – May 13
PotatoesPlant outdoors · May 6 – May 20
LettuceSow outdoors · Apr 29 – May 13
Carrots, beetsSow outdoors · May 6 – May 20
TomatoesStart indoors · Apr 1 – Apr 15
TomatoesTransplant · Jun 3 – Jun 17
Peppers, eggplantStart indoors · Mar 18 – Apr 1
Peppers, eggplantTransplant · Jun 10 – Jun 24
BeansSow outdoors · Jun 3 – Jun 17
Sweet cornSow outdoors · Jun 3 – Jun 17
Cucumbers, squashSow outdoors · Jun 3 – Jun 17
Fall lettuce, spinachSow outdoors · Jul 20 – Aug 3
GarlicPlant cloves · Aug 31 – Oct 5
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 27) and first fall frost (Sep 14) 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 59082 came on Mar 14 — 33 days earlier than the 1991–2020 average (Apr 16).

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 5a in Montana

548 plants native to the lower 48 states, recorded in Montana, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. Each links to its USDA PLANTS profile.

Trees 26

American elm120 ft · blooms early spring · medium shade tolerance · to −46 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °FDouglas-fir200 ft · blooms mid spring · medium shade tolerance · to −33 °Feastern cottonwood190 ft · blooms spring · high shade tolerance · to −43 °F

Shrubs 96

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °Falderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °F

Wildflowers & perennials 253

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °F

Grasses 161

Alaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °Falkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAlpine Meadow-Foxtail0.5 ft · blooms mid spring · medium shade tolerance · to −33 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °F

Vines 3

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fwestern white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °F

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 Springdale, MT.

Soil in Springdale, MT

The soil mapped at the center of ZIP 59082 is Cabba — loam, well drained.

TextureLoama good balance for most vegetables
pH8.2alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Cabba-Doney loams, 8 to 35 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 59082; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Springdale, MT

Summer high86 °Faverage high, July
Winter low19 °Faverage low, January
Hot days28days a year at 90 °F or more
Freezing nights162nights a year at 32 °F or less
Growing degree days1,839base 50 °F — the season’s usable heat
Longest day15 h 44 mindaylight on June 21
Shortest day8 h 39 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation15.3 inper year, rain and melted snow
Snowfall19 inper year; 13 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 37 °F, low 19 °F 37°19° JanFebruary: average high 39 °F, low 19 °F 39°19° FebMarch: average high 48 °F, low 24 °F 48°24° MarApril: average high 54 °F, low 30 °F 54°30° AprMay: average high 64 °F, low 38 °F 64°38° MayJune: average high 74 °F, low 45 °F 74°45° JunJuly: average high 86 °F, low 50 °F 86°50° JulAugust: average high 85 °F, low 48 °F 85°48° AugSeptember: average high 74 °F, low 41 °F 74°41° SepOctober: average high 58 °F, low 33 °F 58°33° OctNovember: average high 45 °F, low 25 °F 45°25° NovDecember: average high 36 °F, low 19 °F 36°19° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″January: 0.59 in precipitation, 2.3 in snowfall 0.6❄2 JanFebruary: 0.63 in precipitation, 4.5 in snowfall 0.6❄5 FebMarch: 0.99 in precipitation, 3.1 in snowfall 1.0❄3 MarApril: 1.77 in precipitation, 0.9 in snowfall 1.8❄1 AprMay: 2.96 in precipitation, 0.2 in snowfall 3.0 MayJune: 2.22 in precipitation 2.2 JunJuly: 1.25 in precipitation 1.3 JulAugust: 0.88 in precipitation 0.9 AugSeptember: 1.17 in precipitation, 0.1 in snowfall 1.2 SepOctober: 1.44 in precipitation, 0.6 in snowfall 1.4❄1 OctNovember: 0.70 in precipitation, 3.6 in snowfall 0.7❄4 NovDecember: 0.70 in precipitation, 4.1 in snowfall 0.7❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Livingston Mission Field, MT (12 mi away); precipitation: Springdale, MT (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

590185a
Clyde Park, MT · 16 mi
590115a
Big Timber, MT · 17 mi
590475a
Livingston, MT · 23 mi
590864b
Wilsall, MT · 23 mi
590525a
Mc Leod, MT · 27 mi
590554b
Melville, MT · 29 mi
597155a
Bozeman, MT · 32 mi
590854b
Two Dot, MT · 33 mi

Montana planting zones →

Questions about 59082

What planting zone is ZIP code 59082?

ZIP code 59082 (Springdale, MT) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Springdale, MT?

The median last spring frost (32 °F) near 59082 is May 27; after June 14 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Livingston Mission Field station.

When is the first frost in Springdale, MT?

The median first fall frost near 59082 is September 14, giving a median frost-free growing season of 108 days.

When should I plant tomatoes in 59082?

Start tomato seeds indoors around Apr 1 – Apr 15 and set transplants outside around Jun 3 – Jun 17, one to three weeks after the median last frost.

How much rain and snow does 59082 get?

About 15.3 inches of precipitation a year and 19 inches of snowfall (NOAA 1991–2020 normals, Springdale station).

How hot do summers get in Springdale, MT?

The average high peaks at 86 °F in July, with about 28 days a year at 90 °F or more.

What kind of soil does 59082 have?

The USDA soil survey maps Cabba at the center of ZIP 59082: loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Springdale, MT in 2026?

Spring leaf-out near 59082 came on Mar 14 in 2026, 33 days earlier than the 1991–2020 average (Apr 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Springdale, MT?

Long-day onions: the longest day near 59082 is 15 h 44 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 59082 change?

Yes. The 2012 USDA map put 59082 in zone 4b; the 2023 map puts it in zone 5a. The newer map uses 1991–2020 data and more weather stations.