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

Planting zone for 65591 — Montreal, MO

ZIP code 65591 (Montreal, Camden County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is March 31 and the first fall frost November 3.

Where ZIP 65591 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.

Zone6b−5 to 0 °F

Coldest night−20.6 to −17.8 °C

Last frostMar 31

First frostNov 3

2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Montreal, MO…

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 Montreal, MO

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 31median — 50% chance of a later frost

Safe for tender plantsApril 18only 10% chance of frost after

First fall frostNovember 3median — 10% chance by Oct 21

Growing season216 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 19 and returns around November 15.

From the NOAA station Lakeside, MO — 16 miles away, elevation 591 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 65591

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 17 – Mar 3

SpinachSow outdoors · Feb 17 – Mar 10

Broccoli, cabbageStart indoors · Jan 20 – Feb 3

Broccoli, cabbageTransplant · Mar 10 – Mar 24

Onion setsPlant outdoors · Mar 3 – Mar 17

PotatoesPlant outdoors · Mar 10 – Mar 24

LettuceSow outdoors · Mar 3 – Mar 17

Carrots, beetsSow outdoors · Mar 10 – Mar 24

TomatoesStart indoors · Feb 3 – Feb 17

TomatoesTransplant · Apr 7 – Apr 21

Peppers, eggplantStart indoors · Jan 20 – Feb 3

Peppers, eggplantTransplant · Apr 14 – Apr 28

BeansSow outdoors · Apr 7 – Apr 21

Sweet cornSow outdoors · Apr 7 – Apr 21

Cucumbers, squashSow outdoors · Apr 7 – Apr 21

Fall lettuce, spinachSow outdoors · Sep 8 – Sep 22

GarlicPlant cloves · Oct 20 – Nov 24

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 31) and first fall frost (Nov 3) 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 65591 came on Feb 28 — 12 days earlier than the 1991–2020 average (Mar 12).

average
Mar 122026
Feb 28

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).

Soil in Montreal, MO

The soil mapped at the center of ZIP 65591 is Union — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables

pH6.1slightly acidic; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter1.25%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Union silt loam, 1 to 3 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 65591; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Montreal, MO

Summer high89 °Faverage high, July

Winter low25 °Faverage low, January

Hot days35days a year at 90 °F or more

Freezing nights88nights a year at 32 °F or less

Growing degree days4,499base 50 °F — the season’s usable heat

Longest day14 h 48 mindaylight on June 21

Shortest day9 h 31 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation42.9 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Lakeside, MO (16 mi away); precipitation: Linn Creek 9.4 Se, MO (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

650526b

Linn Creek, MO · 9 mi

Camdenton, MO · 11 mi

650657a

Osage Beach, MO · 11 mi

Missouri planting zones →

Questions about 65591

What planting zone is ZIP code 65591?

ZIP code 65591 (Montreal, MO) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Montreal, MO?

The median last spring frost (32 °F) near 65591 is March 31; after April 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Lakeside station.

When is the first frost in Montreal, MO?

The median first fall frost near 65591 is November 3, giving a median frost-free growing season of 216 days.

When should I plant tomatoes in 65591?

Start tomato seeds indoors around Feb 3 – Feb 17 and set transplants outside around Apr 7 – Apr 21, one to three weeks after the median last frost.

How much rain and snow does 65591 get?

About 42.9 inches of precipitation a year (NOAA 1991–2020 normals, Linn Creek 9.4 Se station).

How hot do summers get in Montreal, MO?

The average high peaks at 89 °F in July, with about 35 days a year at 90 °F or more.

What kind of soil does 65591 have?

The USDA soil survey maps Union at the center of ZIP 65591: silt loam, moderately well drained, pH about 6.1 (slightly acidic).

Did spring come early in Montreal, MO in 2026?

Spring leaf-out near 65591 came on Feb 28 in 2026, 12 days earlier than the 1991–2020 average (Mar 12), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Montreal, MO?

Intermediate onions: the longest day near 65591 is 14 h 48 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 65591 change?

Yes. The 2012 USDA map put 65591 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.