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

Planting zone for 70377 — Montegut, LA

ZIP code 70377 (Montegut, Terrebonne County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 8 and the first fall frost December 19.

Where ZIP 70377 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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostFeb 8
First frostDec 19
2012 zone9a

Was 9a 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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Montegut, LA…

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 Montegut, LA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 8median — 50% chance of a later frost
Safe for tender plantsMarch 12only 10% chance of frost after
First fall frostDecember 19median — 10% chance by Nov 20
Growing season311 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 28 and returns around January 3.

From the NOAA station Galliano, LA — 14 miles away, elevation 7 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 70377

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Dec 28 – Jan 11
SpinachSow outdoors · Dec 28 – Jan 18
Broccoli, cabbageStart indoors · Nov 30 – Dec 14
Broccoli, cabbageTransplant · Jan 18 – Feb 1
Onion setsPlant outdoors · Jan 11 – Jan 25
PotatoesPlant outdoors · Jan 18 – Feb 1
LettuceSow outdoors · Jan 11 – Jan 25
Carrots, beetsSow outdoors · Jan 18 – Feb 1
TomatoesStart indoors · Dec 14 – Dec 28
TomatoesTransplant · Feb 15 – Mar 1
Peppers, eggplantStart indoors · Nov 30 – Dec 14
Peppers, eggplantTransplant · Feb 22 – Mar 8
BeansSow outdoors · Feb 15 – Mar 1
Sweet cornSow outdoors · Feb 15 – Mar 1
Cucumbers, squashSow outdoors · Feb 15 – Mar 1
Fall lettuce, spinachSow outdoors · Oct 24 – Nov 7
GarlicPlant cloves · Dec 5 – Jan 9
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 8) and first fall frost (Dec 19) 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 70377 came on Jan 11 — 12 days earlier than the 1991–2020 average (Jan 23).

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 9b in Louisiana

519 plants native to the lower 48 states, recorded in Louisiana, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. Each links to its USDA PLANTS profile.

Trees 69

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Fbald cypress130 ft · blooms mid spring · medium shade tolerance · to −18 °F

Shrubs 108

aloe yucca15 ft · blooms early summer · medium shade tolerance · to −1 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °F

Wildflowers & perennials 170

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 150

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fbig cordgrass8 ft · blooms spring · high shade tolerance · to −3 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °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 Montegut, LA.

Soil in Montegut, LA

The center of ZIP 70377 is mapped as Water: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

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 70377; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Montegut, LA

Summer high89 °Faverage high, July
Winter low45 °Faverage low, January
Hot days49days a year at 90 °F or more
Freezing nights9nights a year at 32 °F or less
Growing degree days7,261base 50 °F — the season’s usable heat
Longest day14 h 02 mindaylight on June 21
Shortest day10 h 15 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation68 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 63 °F, low 45 °F 63°45° JanFebruary: average high 66 °F, low 48 °F 66°48° FebMarch: average high 71 °F, low 55 °F 71°55° MarApril: average high 77 °F, low 61 °F 77°61° AprMay: average high 83 °F, low 68 °F 83°68° MayJune: average high 88 °F, low 74 °F 88°74° JunJuly: average high 89 °F, low 76 °F 89°76° JulAugust: average high 89 °F, low 76 °F 89°76° AugSeptember: average high 86 °F, low 72 °F 86°72° SepOctober: average high 80 °F, low 63 °F 80°63° OctNovember: average high 71 °F, low 52 °F 71°52° NovDecember: average high 65 °F, low 47 °F 65°47° Dec

Precipitation by month inches

0″2″4″6″8″10″January: 5.61 in precipitation 5.6 JanFebruary: 3.94 in precipitation 3.9 FebMarch: 4.38 in precipitation 4.4 MarApril: 4.45 in precipitation 4.5 AprMay: 9.14 in precipitation 9.1 MayJune: 7.41 in precipitation 7.4 JunJuly: 7.20 in precipitation 7.2 JulAugust: 7.25 in precipitation 7.3 AugSeptember: 5.85 in precipitation 5.8 SepOctober: 4.85 in precipitation 4.8 OctNovember: 3.69 in precipitation 3.7 NovDecember: 4.19 in precipitation 4.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Galliano, LA (14 mi away); precipitation: Dulac 3n, LA (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

703439b
Bourg, LA · 6 mi
703449b
Chauvin, LA · 7 mi
703749b
Lockport, LA · 10 mi
703639b
Houma, LA · 11 mi
703549b
Galliano, LA · 12 mi
703539b
Dulac, LA · 12 mi
703619b
Houma, LA · 15 mi
703649b
Houma, LA · 15 mi

Louisiana planting zones →

Questions about 70377

What planting zone is ZIP code 70377?

ZIP code 70377 (Montegut, LA) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

When is the last frost in Montegut, LA?

The median last spring frost (32 °F) near 70377 is February 8; after March 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Galliano station.

When is the first frost in Montegut, LA?

The median first fall frost near 70377 is December 19, giving a median frost-free growing season of 311 days.

When should I plant tomatoes in 70377?

Start tomato seeds indoors around Dec 14 – Dec 28 and set transplants outside around Feb 15 – Mar 1, one to three weeks after the median last frost.

How much rain and snow does 70377 get?

About 68 inches of precipitation a year (NOAA 1991–2020 normals, Dulac 3n station).

How hot do summers get in Montegut, LA?

The average high peaks at 89 °F in July, with about 49 days a year at 90 °F or more.

Did spring come early in Montegut, LA in 2026?

Spring leaf-out near 70377 came on Jan 11 in 2026, 12 days earlier than the 1991–2020 average (Jan 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Montegut, LA?

Short-day onions: the longest day near 70377 is 14 h 02 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 70377 change?

Yes. The 2012 USDA map put 70377 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.