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

Planting zone for 45633 — Hallsville, OH

ZIP code 45633 (Hallsville, Ross County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 17 and the first fall frost October 28.

Where ZIP 45633 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 17
First frostOct 28
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 Hallsville, 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 Hallsville, 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 4only 10% chance of frost after
First fall frostOctober 28median — 10% chance by Oct 14
Growing season192 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 7.

From the NOAA station Circleville, OH — 15 miles away, elevation 676 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 45633

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 · Sep 2 – Sep 16
GarlicPlant cloves · Oct 14 – Nov 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 17) and first fall frost (Oct 28) 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 45633 came on Mar 10 — 14 days earlier than the 1991–2020 average (Mar 24).

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 Hallsville, OH

The soil mapped at the center of ZIP 45633 is Celina — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH6.5neutral; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter2%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classprime farmlandUSDA classification

Map unit: Celina silt loam, 2 to 6 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 45633; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hallsville, OH

Summer high86 °Faverage high, July
Winter low23 °Faverage low, January
Hot days19days a year at 90 °F or more
Freezing nights110nights a year at 32 °F or less
Growing degree days3,751base 50 °F — the season’s usable heat
Longest day14 h 57 mindaylight on June 21
Shortest day9 h 23 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation40.2 inper year, rain and melted snow
Snowfall15 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 39 °F, low 23 °F 39°23° JanFebruary: average high 42 °F, low 25 °F 42°25° FebMarch: average high 52 °F, low 33 °F 52°33° MarApril: average high 66 °F, low 42 °F 66°42° AprMay: average high 75 °F, low 53 °F 75°53° MayJune: average high 83 °F, low 62 °F 83°62° JunJuly: average high 86 °F, low 65 °F 86°65° JulAugust: average high 85 °F, low 64 °F 85°64° AugSeptember: average high 80 °F, low 57 °F 80°57° SepOctober: average high 68 °F, low 45 °F 68°45° OctNovember: average high 54 °F, low 35 °F 54°35° NovDecember: average high 43 °F, low 28 °F 43°28° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 2.80 in precipitation, 6.8 in snowfall 2.8❄7 JanFebruary: 2.45 in precipitation, 4.2 in snowfall 2.5❄4 FebMarch: 3.29 in precipitation, 1.4 in snowfall 3.3❄1 MarApril: 4.03 in precipitation 4.0 AprMay: 4.13 in precipitation 4.1 MayJune: 4.29 in precipitation 4.3 JunJuly: 3.95 in precipitation 4.0 JulAugust: 3.49 in precipitation 3.5 AugSeptember: 3.16 in precipitation 3.2 SepOctober: 2.95 in precipitation 3.0 OctNovember: 2.90 in precipitation, 0.1 in snowfall 2.9 NovDecember: 2.80 in precipitation, 2.8 in snowfall 2.8❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Circleville, OH (15 mi away); precipitation: Laurelville, OH (within 1 mile). 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.

431016b
Adelphi, OH · <1 mi
431356b
Laurelville, OH · 2 mi
456446b
Kingston, OH · 5 mi
431526b
South Bloomingville, OH · 9 mi
431546a
Stoutsville, OH · 11 mi
431496b
Rockbridge, OH · 11 mi
456476b
Londonderry, OH · 11 mi
431026b
Amanda, OH · 12 mi

Ohio planting zones →

Questions about 45633

What planting zone is ZIP code 45633?

ZIP code 45633 (Hallsville, OH) 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 Hallsville, OH?

The median last spring frost (32 °F) near 45633 is April 17; after May 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Circleville station.

When is the first frost in Hallsville, OH?

The median first fall frost near 45633 is October 28, giving a median frost-free growing season of 192 days.

When should I plant tomatoes in 45633?

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 45633 get?

About 40.2 inches of precipitation a year and 15 inches of snowfall (NOAA 1991–2020 normals, Laurelville station).

How hot do summers get in Hallsville, OH?

The average high peaks at 86 °F in July, with about 19 days a year at 90 °F or more.

What kind of soil does 45633 have?

The USDA soil survey maps Celina at the center of ZIP 45633: silt loam, moderately well drained, pH about 6.5 (neutral).

Did spring come early in Hallsville, OH in 2026?

Spring leaf-out near 45633 came on Mar 10 in 2026, 14 days earlier than the 1991–2020 average (Mar 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Hallsville, OH?

Intermediate onions: the longest day near 45633 is 14 h 57 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45633 change?

Yes. The 2012 USDA map put 45633 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.