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

Planting zone for 45746 — Macksburg, OH

ZIP code 45746 (Macksburg, Washington County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 30 and the first fall frost October 14.

Where ZIP 45746 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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 30
First frostOct 14
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 Macksburg, 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 Macksburg, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 30median — 50% chance of a later frost
Safe for tender plantsMay 20only 10% chance of frost after
First fall frostOctober 14median — 10% chance by Sep 30
Growing season167 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 19 and returns around October 27.

From the NOAA station Caldwell 3se, OH — 8 miles away, elevation 879 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 45746

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 19 – Apr 2
SpinachSow outdoors · Mar 19 – Apr 9
Broccoli, cabbageStart indoors · Feb 19 – Mar 5
Broccoli, cabbageTransplant · Apr 9 – Apr 23
Onion setsPlant outdoors · Apr 2 – Apr 16
PotatoesPlant outdoors · Apr 9 – Apr 23
LettuceSow outdoors · Apr 2 – Apr 16
Carrots, beetsSow outdoors · Apr 9 – Apr 23
TomatoesStart indoors · Mar 5 – Mar 19
TomatoesTransplant · May 7 – May 21
Peppers, eggplantStart indoors · Feb 19 – Mar 5
Peppers, eggplantTransplant · May 14 – May 28
BeansSow outdoors · May 7 – May 21
Sweet cornSow outdoors · May 7 – May 21
Cucumbers, squashSow outdoors · May 7 – May 21
Fall lettuce, spinachSow outdoors · Aug 19 – Sep 2
GarlicPlant cloves · Sep 30 – Nov 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 30) and first fall frost (Oct 14) 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 45746 came on Mar 10 — 13 days earlier than the 1991–2020 average (Mar 23).

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 Macksburg, OH

The soil mapped at the center of ZIP 45746 is Morristown — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH7.5slightly alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.23%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Morristown silt loam, 8 to 25 percent slopes, reclaimed.

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 45746; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Macksburg, OH

Summer high82 °Faverage high, July
Winter low20 °Faverage low, January
Hot days7days a year at 90 °F or more
Freezing nights126nights a year at 32 °F or less
Growing degree days3,016base 50 °F — the season’s usable heat
Longest day14 h 58 mindaylight on June 21
Shortest day9 h 22 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation44.5 inper year, rain and melted snow
Snowfall16 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 39 °F, low 20 °F 39°20° JanFebruary: average high 42 °F, low 22 °F 42°22° FebMarch: average high 53 °F, low 28 °F 53°28° MarApril: average high 64 °F, low 38 °F 64°38° AprMay: average high 73 °F, low 48 °F 73°48° MayJune: average high 80 °F, low 57 °F 80°57° JunJuly: average high 82 °F, low 62 °F 82°62° JulAugust: average high 82 °F, low 59 °F 82°59° AugSeptember: average high 77 °F, low 52 °F 77°52° SepOctober: average high 66 °F, low 41 °F 66°41° OctNovember: average high 54 °F, low 32 °F 54°32° NovDecember: average high 44 °F, low 25 °F 44°25° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.60 in precipitation, 7.1 in snowfall 3.6❄7 JanFebruary: 3.08 in precipitation, 4.3 in snowfall 3.1❄4 FebMarch: 4.08 in precipitation, 1.8 in snowfall 4.1❄2 MarApril: 3.61 in precipitation, 0.1 in snowfall 3.6 AprMay: 4.44 in precipitation 4.4 MayJune: 4.58 in precipitation 4.6 JunJuly: 4.60 in precipitation 4.6 JulAugust: 3.60 in precipitation 3.6 AugSeptember: 3.64 in precipitation 3.6 SepOctober: 2.96 in precipitation 3.0 OctNovember: 3.03 in precipitation, 0.2 in snowfall 3.0 NovDecember: 3.31 in precipitation, 2.2 in snowfall 3.3❄2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Caldwell 3se, OH (8 mi away); precipitation: Beverly Stp, OH (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

457276b
Dexter City, OH · 4 mi
457446b
Lowell, OH · 4 mi
457456b
Lower Salem, OH · 6 mi
457886b
Whipple, OH · 7 mi
457216b
Coal Run, OH · 7 mi
437246b
Caldwell, OH · 9 mi
457156b
Beverly, OH · 9 mi
457896b
Wingett Run, OH · 11 mi

Ohio planting zones →

Questions about 45746

What planting zone is ZIP code 45746?

ZIP code 45746 (Macksburg, 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 Macksburg, OH?

The median last spring frost (32 °F) near 45746 is April 30; after May 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Caldwell 3se station.

When is the first frost in Macksburg, OH?

The median first fall frost near 45746 is October 14, giving a median frost-free growing season of 167 days.

When should I plant tomatoes in 45746?

Start tomato seeds indoors around Mar 5 – Mar 19 and set transplants outside around May 7 – May 21, one to three weeks after the median last frost.

How much rain and snow does 45746 get?

About 44.5 inches of precipitation a year and 16 inches of snowfall (NOAA 1991–2020 normals, Beverly Stp station).

How hot do summers get in Macksburg, OH?

The average high peaks at 82 °F in July, with about 7 days a year at 90 °F or more.

What kind of soil does 45746 have?

The USDA soil survey maps Morristown at the center of ZIP 45746: silt loam, well drained, pH about 7.5 (slightly alkaline).

Did spring come early in Macksburg, OH in 2026?

Spring leaf-out near 45746 came on Mar 10 in 2026, 13 days earlier than the 1991–2020 average (Mar 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Macksburg, OH?

Intermediate onions: the longest day near 45746 is 14 h 58 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45746 change?

Yes. The 2012 USDA map put 45746 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.