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

Planting zone for 65102 — Jefferson City, MO

ZIP code 65102 (Jefferson City, Cole County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 8 and the first fall frost October 31.

Where ZIP 65102 is

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 frostApr 8
First frostOct 31
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 Jefferson City, 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 Jefferson City, MO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 8median — 50% chance of a later frost
Safe for tender plantsApril 23only 10% chance of frost after
First fall frostOctober 31median — 10% chance by Oct 17
Growing season205 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 28 and returns around November 8.

From the NOAA station Jefferson City Wtp, MO — within 1 mile, elevation 650 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 65102

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 25 – Mar 11
SpinachSow outdoors · Feb 25 – Mar 18
Broccoli, cabbageStart indoors · Jan 28 – Feb 11
Broccoli, cabbageTransplant · Mar 18 – Apr 1
Onion setsPlant outdoors · Mar 11 – Mar 25
PotatoesPlant outdoors · Mar 18 – Apr 1
LettuceSow outdoors · Mar 11 – Mar 25
Carrots, beetsSow outdoors · Mar 18 – Apr 1
TomatoesStart indoors · Feb 11 – Feb 25
TomatoesTransplant · Apr 15 – Apr 29
Peppers, eggplantStart indoors · Jan 28 – Feb 11
Peppers, eggplantTransplant · Apr 22 – May 6
BeansSow outdoors · Apr 15 – Apr 29
Sweet cornSow outdoors · Apr 15 – Apr 29
Cucumbers, squashSow outdoors · Apr 15 – Apr 29
Fall lettuce, spinachSow outdoors · Sep 5 – Sep 19
GarlicPlant cloves · Oct 17 – Nov 21
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 8) and first fall frost (Oct 31) 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 65102 came on Mar 2 — 12 days earlier than the 1991–2020 average (Mar 14).

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 6b in Missouri

525 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. Each links to its USDA PLANTS profile.

Trees 70

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 83

alternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican black currant3 ft · blooms early spring · to −46 °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 °F

Wildflowers & perennials 192

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °F

Grasses 157

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fblister sedge3 ft · blooms late spring · medium shade tolerance · to −38 °F

Vines 12

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fgraybark grape50 ft · blooms late spring · medium shade tolerance · to −8 °Fheartleaf peppervine2 ft · blooms late spring · low shade tolerance · to −8 °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 Jefferson City, MO.

Soil in Jefferson City, MO

The soil mapped at the center of ZIP 65102 is Udorthents — silty clay loam, moderately well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.1strongly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter0.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land, 3 to 15 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 65102; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Jefferson City, MO

Summer high88 °Faverage high, July
Winter low21 °Faverage low, January
Hot days37days a year at 90 °F or more
Freezing nights106nights a year at 32 °F or less
Growing degree days4,107base 50 °F — the season’s usable heat
Longest day14 h 52 mindaylight on June 21
Shortest day9 h 28 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation43.6 inper year, rain and melted snow
Snowfall9 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 40 °F, low 21 °F 40°21° JanFebruary: average high 45 °F, low 25 °F 45°25° FebMarch: average high 56 °F, low 34 °F 56°34° MarApril: average high 67 °F, low 44 °F 67°44° AprMay: average high 75 °F, low 55 °F 75°55° MayJune: average high 84 °F, low 64 °F 84°64° JunJuly: average high 88 °F, low 69 °F 88°69° JulAugust: average high 87 °F, low 67 °F 87°67° AugSeptember: average high 80 °F, low 58 °F 80°58° SepOctober: average high 69 °F, low 46 °F 69°46° OctNovember: average high 55 °F, low 35 °F 55°35° NovDecember: average high 44 °F, low 26 °F 44°26° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 2.21 in precipitation, 2.9 in snowfall 2.2❄3 JanFebruary: 2.30 in precipitation, 2.9 in snowfall 2.3❄3 FebMarch: 3.24 in precipitation, 0.4 in snowfall 3.2 MarApril: 4.78 in precipitation 4.8 AprMay: 5.17 in precipitation 5.2 MayJune: 4.20 in precipitation 4.2 JunJuly: 4.35 in precipitation 4.3 JulAugust: 4.13 in precipitation 4.1 AugSeptember: 4.24 in precipitation 4.2 SepOctober: 3.44 in precipitation 3.4 OctNovember: 3.24 in precipitation, 0.2 in snowfall 3.2 NovDecember: 2.30 in precipitation, 2.5 in snowfall 2.3❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Jefferson City Wtp, MO (within 1 mile); precipitation: Jefferson City Wtp, MO (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

651036b
Jefferson City, MO · <1 mi
651046b
Jefferson City, MO · <1 mi
651056b
Jefferson City, MO · <1 mi
651066b
Jefferson City, MO · <1 mi
651076b
Jefferson City, MO · <1 mi
651086b
Jefferson City, MO · <1 mi
651106b
Jefferson City, MO · <1 mi
650436b
Holts Summit, MO · 5 mi

All 11 ZIP codes in Jefferson City → · Missouri planting zones →

Questions about 65102

What planting zone is ZIP code 65102?

ZIP code 65102 (Jefferson City, 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 Jefferson City, MO?

The median last spring frost (32 °F) near 65102 is April 8; after April 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Jefferson City Wtp station.

When is the first frost in Jefferson City, MO?

The median first fall frost near 65102 is October 31, giving a median frost-free growing season of 205 days.

When should I plant tomatoes in 65102?

Start tomato seeds indoors around Feb 11 – Feb 25 and set transplants outside around Apr 15 – Apr 29, one to three weeks after the median last frost.

How much rain and snow does 65102 get?

About 43.6 inches of precipitation a year and 9 inches of snowfall (NOAA 1991–2020 normals, Jefferson City Wtp station).

How hot do summers get in Jefferson City, MO?

The average high peaks at 88 °F in July, with about 37 days a year at 90 °F or more.

What kind of soil does 65102 have?

The USDA soil survey maps Udorthents at the center of ZIP 65102: silty clay loam, moderately well drained, pH about 5.1 (strongly acidic).

Did spring come early in Jefferson City, MO in 2026?

Spring leaf-out near 65102 came on Mar 2 in 2026, 12 days earlier than the 1991–2020 average (Mar 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Jefferson City, MO?

Intermediate onions: the longest day near 65102 is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 65102 change?

Yes. The 2012 USDA map put 65102 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.