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

Planting zone for 37340 — Guild, TN

ZIP code 37340 (Guild, Marion County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is March 31 and the first fall frost November 6.

Where ZIP 37340 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 frostMar 31
First frostNov 6
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 Guild, 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 Guild, TN

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 6median — 10% chance by Oct 24
Growing season219 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 21 and returns around November 17.

From the NOAA station Lookout Mtn-Point Park, TN — 10 miles away, elevation 2,110 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 37340

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 11 – Sep 25
GarlicPlant cloves · Oct 23 – Nov 27
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 31) and first fall frost (Nov 6) 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 37340 came on Feb 21 — 6 days earlier than the 1991–2020 average (Feb 27).

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 Guild, TN

The soil mapped at the center of ZIP 37340 is Jefferson — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH5.0strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Jefferson fine sandy loam, rolling phase.

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 37340; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Guild, TN

Summer high84 °Faverage high, July
Winter low29 °Faverage low, January
Hot days7days a year at 90 °F or more
Freezing nights69nights a year at 32 °F or less
Growing degree days4,113base 50 °F — the season’s usable heat
Longest day14 h 31 mindaylight on June 21
Shortest day9 h 48 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation58.6 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 46 °F, low 29 °F 46°29° JanFebruary: average high 49 °F, low 31 °F 49°31° FebMarch: average high 58 °F, low 39 °F 58°39° MarApril: average high 68 °F, low 47 °F 68°47° AprMay: average high 74 °F, low 57 °F 74°57° MayJune: average high 81 °F, low 65 °F 81°65° JunJuly: average high 84 °F, low 67 °F 84°67° JulAugust: average high 82 °F, low 67 °F 82°67° AugSeptember: average high 78 °F, low 61 °F 78°61° SepOctober: average high 67 °F, low 51 °F 67°51° OctNovember: average high 57 °F, low 40 °F 57°40° NovDecember: average high 49 °F, low 32 °F 49°32° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 5.53 in precipitation 5.5 JanFebruary: 5.99 in precipitation 6.0 FebMarch: 5.59 in precipitation 5.6 MarApril: 5.52 in precipitation 5.5 AprMay: 4.31 in precipitation 4.3 MayJune: 4.21 in precipitation 4.2 JunJuly: 4.78 in precipitation 4.8 JulAugust: 3.98 in precipitation 4.0 AugSeptember: 4.92 in precipitation 4.9 SepOctober: 3.78 in precipitation 3.8 OctNovember: 4.62 in precipitation 4.6 NovDecember: 5.37 in precipitation 5.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Lookout Mtn-Point Park, TN (10 mi away); precipitation: Lookout Mtn-Point Park, TN (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

373967b
Whiteside, TN · 2 mi
374197b
Chattanooga, TN · 6 mi
373478a
Jasper, TN · 6 mi
307578a
Wildwood, GA · 7 mi
307527b
Trenton, GA · 7 mi
307507b
Lookout Mountain, GA · 10 mi
373507b
Lookout Mountain, TN · 10 mi
359587b
Bryant, AL · 10 mi

Tennessee planting zones →

Questions about 37340

What planting zone is ZIP code 37340?

ZIP code 37340 (Guild, 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 Guild, TN?

The median last spring frost (32 °F) near 37340 is March 31; after April 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Lookout Mtn-Point Park station.

When is the first frost in Guild, TN?

The median first fall frost near 37340 is November 6, giving a median frost-free growing season of 219 days.

When should I plant tomatoes in 37340?

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 37340 get?

About 58.6 inches of precipitation a year (NOAA 1991–2020 normals, Lookout Mtn-Point Park station).

How hot do summers get in Guild, TN?

The average high peaks at 84 °F in July, with about 7 days a year at 90 °F or more.

What kind of soil does 37340 have?

The USDA soil survey maps Jefferson at the center of ZIP 37340: fine sandy loam, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Guild, TN in 2026?

Spring leaf-out near 37340 came on Feb 21 in 2026, 6 days earlier than the 1991–2020 average (Feb 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Guild, TN?

Intermediate onions: the longest day near 37340 is 14 h 31 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 37340 change?

Yes. The 2012 USDA map put 37340 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.