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

Planting zone for 45682 — South Webster, OH

ZIP code 45682 (South Webster, Scioto County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 17 and the first fall frost October 25.

Where ZIP 45682 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 17
First frostOct 25
2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for South Webster, OH…

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 South Webster, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 17median — 50% chance of a later frost
Safe for tender plantsMay 5only 10% chance of frost after
First fall frostOctober 25median — 10% chance by Oct 11
Growing season191 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 4.

From the NOAA station Portsmouth-Sciotoville, OH — 11 miles away, elevation 541 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 45682

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 6 – Mar 20
SpinachSow outdoors · Mar 6 – Mar 27
Broccoli, cabbageStart indoors · Feb 6 – Feb 20
Broccoli, cabbageTransplant · Mar 27 – Apr 10
Onion setsPlant outdoors · Mar 20 – Apr 3
PotatoesPlant outdoors · Mar 27 – Apr 10
LettuceSow outdoors · Mar 20 – Apr 3
Carrots, beetsSow outdoors · Mar 27 – Apr 10
TomatoesStart indoors · Feb 20 – Mar 6
TomatoesTransplant · Apr 24 – May 8
Peppers, eggplantStart indoors · Feb 6 – Feb 20
Peppers, eggplantTransplant · May 1 – May 15
BeansSow outdoors · Apr 24 – May 8
Sweet cornSow outdoors · Apr 24 – May 8
Cucumbers, squashSow outdoors · Apr 24 – May 8
Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13
GarlicPlant cloves · Oct 11 – Nov 15
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 17) and first fall frost (Oct 25) 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 45682 came on Mar 8 — 9 days earlier than the 1991–2020 average (Mar 17).

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 South Webster, OH

The soil mapped at the center of ZIP 45682 is Piopolis — silt loam, very poorly drained.

TextureSilt loama good balance for most vegetables
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageVery poorly drainedconsider raised beds
Organic matter2%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classNot prime farmlandUSDA classification

Map unit: Piopolis silt loam, ponded.

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 45682; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in South Webster, OH

Summer high87 °Faverage high, July
Winter low23 °Faverage low, January
Hot days26days a year at 90 °F or more
Freezing nights106nights a year at 32 °F or less
Growing degree days3,784base 50 °F — the season’s usable heat
Longest day14 h 53 mindaylight on June 21
Shortest day9 h 27 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation37.4 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 41 °F, low 23 °F 41°23° JanFebruary: average high 45 °F, low 25 °F 45°25° FebMarch: average high 55 °F, low 33 °F 55°33° MarApril: average high 67 °F, low 42 °F 67°42° AprMay: average high 76 °F, low 52 °F 76°52° MayJune: average high 83 °F, low 61 °F 83°61° JunJuly: average high 87 °F, low 65 °F 87°65° JulAugust: average high 86 °F, low 63 °F 86°63° AugSeptember: average high 80 °F, low 56 °F 80°56° SepOctober: average high 69 °F, low 44 °F 69°44° OctNovember: average high 56 °F, low 33 °F 56°33° NovDecember: average high 46 °F, low 28 °F 46°28° Dec

Precipitation by month inches

0″1″2″3″4″January: 3.29 in precipitation 3.3 JanFebruary: 2.51 in precipitation 2.5 FebMarch: 3.11 in precipitation 3.1 MarApril: 3.19 in precipitation 3.2 AprMay: 3.16 in precipitation 3.2 MayJune: 3.61 in precipitation 3.6 JunJuly: 3.35 in precipitation 3.4 JulAugust: 3.25 in precipitation 3.3 AugSeptember: 3.54 in precipitation 3.5 SepOctober: 2.46 in precipitation 2.5 OctNovember: 2.58 in precipitation 2.6 NovDecember: 3.35 in precipitation 3.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Portsmouth-Sciotoville, OH (11 mi away); precipitation: Oak Hill 0.6 Ssw, OH (9 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.

456777a
Scioto Furnace, OH · 3 mi
456947a
Wheelersburg, OH · 6 mi
456566b
Oak Hill, OH · 7 mi
456536b
Minford, OH · 9 mi
456887a
Waterloo, OH · 10 mi
456597a
Pedro, OH · 11 mi
456627a
Portsmouth, OH · 12 mi
456297a
Franklin Furnace, OH · 12 mi

Ohio planting zones →

Questions about 45682

What planting zone is ZIP code 45682?

ZIP code 45682 (South Webster, OH) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in South Webster, OH?

The median last spring frost (32 °F) near 45682 is April 17; after May 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Portsmouth-Sciotoville station.

When is the first frost in South Webster, OH?

The median first fall frost near 45682 is October 25, giving a median frost-free growing season of 191 days.

When should I plant tomatoes in 45682?

Start tomato seeds indoors around Feb 20 – Mar 6 and set transplants outside around Apr 24 – May 8, one to three weeks after the median last frost.

How much rain and snow does 45682 get?

About 37.4 inches of precipitation a year (NOAA 1991–2020 normals, Oak Hill 0.6 Ssw station).

How hot do summers get in South Webster, OH?

The average high peaks at 87 °F in July, with about 26 days a year at 90 °F or more.

What kind of soil does 45682 have?

The USDA soil survey maps Piopolis at the center of ZIP 45682: silt loam, very poorly drained, pH about 5.8 (moderately acidic).

Did spring come early in South Webster, OH in 2026?

Spring leaf-out near 45682 came on Mar 8 in 2026, 9 days earlier than the 1991–2020 average (Mar 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in South Webster, OH?

Intermediate onions: the longest day near 45682 is 14 h 53 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45682 change?

Yes. The 2012 USDA map put 45682 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.