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

Planting zone for 37760 — Jefferson City, TN

ZIP code 37760 (Jefferson City, Jefferson County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 24 and the first fall frost October 17.

Where ZIP 37760 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostApr 24
First frostOct 17
2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Jefferson City, TN…

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, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 24median — 50% chance of a later frost
Safe for tender plantsMay 13only 10% chance of frost after
First fall frostOctober 17median — 10% chance by Oct 6
Growing season175 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 11 and returns around October 27.

From the NOAA station Jefferson City, TN — within 1 mile, elevation 1,109 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 37760

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 13 – Mar 27
SpinachSow outdoors · Mar 13 – Apr 3
Broccoli, cabbageStart indoors · Feb 13 – Feb 27
Broccoli, cabbageTransplant · Apr 3 – Apr 17
Onion setsPlant outdoors · Mar 27 – Apr 10
PotatoesPlant outdoors · Apr 3 – Apr 17
LettuceSow outdoors · Mar 27 – Apr 10
Carrots, beetsSow outdoors · Apr 3 – Apr 17
TomatoesStart indoors · Feb 27 – Mar 13
TomatoesTransplant · May 1 – May 15
Peppers, eggplantStart indoors · Feb 13 – Feb 27
Peppers, eggplantTransplant · May 8 – May 22
BeansSow outdoors · May 1 – May 15
Sweet cornSow outdoors · May 1 – May 15
Cucumbers, squashSow outdoors · May 1 – May 15
Fall lettuce, spinachSow outdoors · Aug 22 – Sep 5
GarlicPlant cloves · Oct 3 – Nov 7
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 24) and first fall frost (Oct 17) 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 37760 came on Feb 25 — 3 days earlier than the 1991–2020 average (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).

Native plants for zone 7b in Tennessee

566 plants native to the lower 48 states, recorded in Tennessee, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Trees 82

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 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 116

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °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 °F

Wildflowers & perennials 184

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °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 speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 157

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 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fbluejoint5 ft · blooms late spring · high shade tolerance · to −33 °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 Jefferson City, TN.

Soil in Jefferson City, TN

The soil mapped at the center of ZIP 37760 is Dewey — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Dewey-Etowah complex, karst, 2 to 30 percent slopes, moderately eroded.

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 37760; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Jefferson City, TN

Summer high87 °Faverage high, July
Winter low25 °Faverage low, January
Hot days24days a year at 90 °F or more
Freezing nights103nights a year at 32 °F or less
Growing degree days3,763base 50 °F — the season’s usable heat
Longest day14 h 37 mindaylight on June 21
Shortest day9 h 42 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation48.5 inper year, rain and melted snow
Snowfall3 inper year; 1 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 47 °F, low 25 °F 47°25° JanFebruary: average high 51 °F, low 27 °F 51°27° FebMarch: average high 61 °F, low 32 °F 61°32° MarApril: average high 70 °F, low 41 °F 70°41° AprMay: average high 78 °F, low 50 °F 78°50° MayJune: average high 84 °F, low 59 °F 84°59° JunJuly: average high 87 °F, low 63 °F 87°63° JulAugust: average high 87 °F, low 62 °F 87°62° AugSeptember: average high 82 °F, low 55 °F 82°55° SepOctober: average high 71 °F, low 42 °F 71°42° OctNovember: average high 60 °F, low 32 °F 60°32° NovDecember: average high 50 °F, low 27 °F 50°27° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 4.12 in precipitation, 1.3 in snowfall 4.1❄1 JanFebruary: 4.46 in precipitation, 1.5 in snowfall 4.5❄2 FebMarch: 4.64 in precipitation 4.6 MarApril: 4.64 in precipitation 4.6 AprMay: 4.10 in precipitation 4.1 MayJune: 3.75 in precipitation 3.8 JunJuly: 5.05 in precipitation 5.0 JulAugust: 3.84 in precipitation 3.8 AugSeptember: 3.33 in precipitation 3.3 SepOctober: 2.69 in precipitation 2.7 OctNovember: 3.36 in precipitation, 0.1 in snowfall 3.4 NovDecember: 4.55 in precipitation, 0.1 in snowfall 4.5 Dec

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

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

378777b
Talbott, TN · 5 mi
378207b
New Market, TN · 6 mi
377257b
Dandridge, TN · 8 mi
378907b
White Pine, TN · 10 mi
378617b
Rutledge, TN · 10 mi
378147b
Morristown, TN · 11 mi
377097b
Blaine, TN · 12 mi
377647b
Kodak, TN · 12 mi

Tennessee planting zones →

Questions about 37760

What planting zone is ZIP code 37760?

ZIP code 37760 (Jefferson City, TN) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Jefferson City, TN?

The median last spring frost (32 °F) near 37760 is April 24; after May 13 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Jefferson City station.

When is the first frost in Jefferson City, TN?

The median first fall frost near 37760 is October 17, giving a median frost-free growing season of 175 days.

When should I plant tomatoes in 37760?

Start tomato seeds indoors around Feb 27 – Mar 13 and set transplants outside around May 1 – May 15, one to three weeks after the median last frost.

How much rain and snow does 37760 get?

About 48.5 inches of precipitation a year and 3 inches of snowfall (NOAA 1991–2020 normals, Jefferson City station).

How hot do summers get in Jefferson City, TN?

The average high peaks at 87 °F in July, with about 24 days a year at 90 °F or more.

What kind of soil does 37760 have?

The USDA soil survey maps Dewey at the center of ZIP 37760: silty clay loam, well drained, pH about 5.3 (strongly acidic).

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

Spring leaf-out near 37760 came on Feb 25 in 2026, 3 days earlier than the 1991–2020 average (Feb 28), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Jefferson City, TN?

Intermediate onions: the longest day near 37760 is 14 h 37 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37760 change?

Yes. The 2012 USDA map put 37760 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.