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

Planting zone for 44470 — Southington, OH

ZIP code 44470 (Southington, Trumbull County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 1 and the first fall frost October 20.

Where ZIP 44470 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostMay 1
First frostOct 20
2012 zone6a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Southington, 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 Southington, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 1median — 50% chance of a later frost
Safe for tender plantsMay 18only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 5
Growing season170 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 21 and returns around November 1.

From the NOAA station Hiram, OH — 2 miles away, elevation 1,230 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 44470

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 20 – Apr 3
SpinachSow outdoors · Mar 20 – Apr 10
Broccoli, cabbageStart indoors · Feb 20 – Mar 6
Broccoli, cabbageTransplant · Apr 10 – Apr 24
Onion setsPlant outdoors · Apr 3 – Apr 17
PotatoesPlant outdoors · Apr 10 – Apr 24
LettuceSow outdoors · Apr 3 – Apr 17
Carrots, beetsSow outdoors · Apr 10 – Apr 24
TomatoesStart indoors · Mar 6 – Mar 20
TomatoesTransplant · May 8 – May 22
Peppers, eggplantStart indoors · Feb 20 – Mar 6
Peppers, eggplantTransplant · May 15 – May 29
BeansSow outdoors · May 8 – May 22
Sweet cornSow outdoors · May 8 – May 22
Cucumbers, squashSow outdoors · May 8 – May 22
Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8
GarlicPlant cloves · Oct 6 – Nov 10
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 1) and first fall frost (Oct 20) 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 44470 came on Mar 21 — 13 days earlier than the 1991–2020 average (Apr 3).

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 Southington, OH

The soil mapped at the center of ZIP 44470 is Remsen — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter4.5%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classFarmland of local importanceUSDA classification

Map unit: Remsen 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 44470; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Southington, OH

Summer high81 °Faverage high, July
Winter low16 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights138nights a year at 32 °F or less
Growing degree days2,603base 50 °F — the season’s usable heat
Longest day15 h 10 mindaylight on June 21
Shortest day9 h 11 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation44.1 inper year, rain and melted snow
Snowfall63 inper year; 67 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 33 °F, low 16 °F 33°16° JanFebruary: average high 35 °F, low 17 °F 35°17° FebMarch: average high 44 °F, low 25 °F 44°25° MarApril: average high 58 °F, low 36 °F 58°36° AprMay: average high 69 °F, low 47 °F 69°47° MayJune: average high 77 °F, low 56 °F 77°56° JunJuly: average high 81 °F, low 60 °F 81°60° JulAugust: average high 80 °F, low 58 °F 80°58° AugSeptember: average high 73 °F, low 52 °F 73°52° SepOctober: average high 61 °F, low 41 °F 61°41° OctNovember: average high 48 °F, low 31 °F 48°31° NovDecember: average high 37 °F, low 23 °F 37°23° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.34 in precipitation, 20.4 in snowfall 3.3❄20 JanFebruary: 2.70 in precipitation, 12.5 in snowfall 2.7❄13 FebMarch: 3.42 in precipitation, 9.9 in snowfall 3.4❄10 MarApril: 4.01 in precipitation, 0.7 in snowfall 4.0❄1 AprMay: 4.06 in precipitation 4.1 MayJune: 4.19 in precipitation 4.2 JunJuly: 4.31 in precipitation 4.3 JulAugust: 3.70 in precipitation 3.7 AugSeptember: 4.04 in precipitation 4.0 SepOctober: 3.77 in precipitation, 0.3 in snowfall 3.8 OctNovember: 3.17 in precipitation, 5.3 in snowfall 3.2❄5 NovDecember: 3.39 in precipitation, 13.8 in snowfall 3.4❄14 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Hiram, OH (2 mi away); precipitation: Hiram, OH (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

444916a
West Farmington, OH · 5 mi
442316a
Garrettsville, OH · 5 mi
444306a
Leavittsburg, OH · 5 mi
440806a
Parkman, OH · 6 mi
442886a
Windham, OH · 7 mi
444856a
Warren, OH · 8 mi
444836a
Warren, OH · 8 mi
444446a
Newton Falls, OH · 9 mi

Ohio planting zones →

Questions about 44470

What planting zone is ZIP code 44470?

ZIP code 44470 (Southington, OH) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Southington, OH?

The median last spring frost (32 °F) near 44470 is May 1; after May 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Hiram station.

When is the first frost in Southington, OH?

The median first fall frost near 44470 is October 20, giving a median frost-free growing season of 170 days.

When should I plant tomatoes in 44470?

Start tomato seeds indoors around Mar 6 – Mar 20 and set transplants outside around May 8 – May 22, one to three weeks after the median last frost.

How much rain and snow does 44470 get?

About 44.1 inches of precipitation a year and 63 inches of snowfall (NOAA 1991–2020 normals, Hiram station).

How hot do summers get in Southington, OH?

The average high peaks at 81 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 44470 have?

The USDA soil survey maps Remsen at the center of ZIP 44470: silt loam, somewhat poorly drained, pH about 5.8 (moderately acidic).

Did spring come early in Southington, OH in 2026?

Spring leaf-out near 44470 came on Mar 21 in 2026, 13 days earlier than the 1991–2020 average (Apr 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Southington, OH?

Long-day onions: the longest day near 44470 is 15 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).