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

Planting zone for 45693 — West Union, OH

ZIP code 45693 (West Union, Adams County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 29 and the first fall frost October 11.

Where ZIP 45693 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 29
First frostOct 11
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 West Union, 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 West Union, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 29median — 50% chance of a later frost
Safe for tender plantsMay 16only 10% chance of frost after
First fall frostOctober 11median — 10% chance by Sep 28
Growing season162 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 20 and returns around October 21.

From the NOAA station Ripley Exp Farm, OH — 14 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 45693

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 18 – Apr 1
SpinachSow outdoors · Mar 18 – Apr 8
Broccoli, cabbageStart indoors · Feb 18 – Mar 4
Broccoli, cabbageTransplant · Apr 8 – Apr 22
Onion setsPlant outdoors · Apr 1 – Apr 15
PotatoesPlant outdoors · Apr 8 – Apr 22
LettuceSow outdoors · Apr 1 – Apr 15
Carrots, beetsSow outdoors · Apr 8 – Apr 22
TomatoesStart indoors · Mar 4 – Mar 18
TomatoesTransplant · May 6 – May 20
Peppers, eggplantStart indoors · Feb 18 – Mar 4
Peppers, eggplantTransplant · May 13 – May 27
BeansSow outdoors · May 6 – May 20
Sweet cornSow outdoors · May 6 – May 20
Cucumbers, squashSow outdoors · May 6 – May 20
Fall lettuce, spinachSow outdoors · Aug 16 – Aug 30
GarlicPlant cloves · Sep 27 – Nov 1
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 29) and first fall frost (Oct 11) 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 45693 came on Mar 9 — 10 days earlier than the 1991–2020 average (Mar 19).

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 West Union, OH

The soil mapped at the center of ZIP 45693 is Brushcreek — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH6.2slightly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter2.25%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Brushcreek silt loam, 6 to 12 percent slopes, eroded.

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 45693; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in West Union, OH

Summer high86 °Faverage high, July
Winter low17 °Faverage low, January
Hot days21days a year at 90 °F or more
Freezing nights128nights a year at 32 °F or less
Growing degree days3,172base 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
Precipitation46.8 inper year, rain and melted snow
Snowfall20 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 40 °F, low 17 °F 40°17° JanFebruary: average high 44 °F, low 20 °F 44°20° FebMarch: average high 53 °F, low 27 °F 53°27° MarApril: average high 66 °F, low 37 °F 66°37° AprMay: average high 75 °F, low 48 °F 75°48° MayJune: average high 83 °F, low 57 °F 83°57° JunJuly: average high 86 °F, low 60 °F 86°60° JulAugust: average high 85 °F, low 58 °F 85°58° AugSeptember: average high 79 °F, low 50 °F 79°50° SepOctober: average high 67 °F, low 39 °F 67°39° OctNovember: average high 54 °F, low 30 °F 54°30° NovDecember: average high 44 °F, low 21 °F 44°21° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.42 in precipitation, 6.9 in snowfall 3.4❄7 JanFebruary: 3.32 in precipitation, 6.6 in snowfall 3.3❄7 FebMarch: 4.39 in precipitation, 3 in snowfall 4.4❄3 MarApril: 4.54 in precipitation, 0.2 in snowfall 4.5 AprMay: 4.79 in precipitation 4.8 MayJune: 4.70 in precipitation 4.7 JunJuly: 4.74 in precipitation 4.7 JulAugust: 3.40 in precipitation 3.4 AugSeptember: 3.33 in precipitation 3.3 SepOctober: 3.37 in precipitation 3.4 OctNovember: 3.02 in precipitation, 0.4 in snowfall 3.0 NovDecember: 3.81 in precipitation, 3.1 in snowfall 3.8❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ripley Exp Farm, OH (14 mi away); precipitation: W Union 6 Ene, OH (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

451056b
Bentonville, OH · 6 mi
456186b
Cherry Fork, OH · 7 mi
456506b
Lynx, OH · 8 mi
451446b
Manchester, OH · 8 mi
451156b
Decatur, OH · 9 mi
456976b
Winchester, OH · 11 mi
456796b
Seaman, OH · 12 mi
451016b
Aberdeen, OH · 13 mi

Ohio planting zones →

Questions about 45693

What planting zone is ZIP code 45693?

ZIP code 45693 (West Union, 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 West Union, OH?

The median last spring frost (32 °F) near 45693 is April 29; after May 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Ripley Exp Farm station.

When is the first frost in West Union, OH?

The median first fall frost near 45693 is October 11, giving a median frost-free growing season of 162 days.

When should I plant tomatoes in 45693?

Start tomato seeds indoors around Mar 4 – Mar 18 and set transplants outside around May 6 – May 20, one to three weeks after the median last frost.

How much rain and snow does 45693 get?

About 46.8 inches of precipitation a year and 20 inches of snowfall (NOAA 1991–2020 normals, W Union 6 Ene station).

How hot do summers get in West Union, OH?

The average high peaks at 86 °F in July, with about 21 days a year at 90 °F or more.

What kind of soil does 45693 have?

The USDA soil survey maps Brushcreek at the center of ZIP 45693: silt loam, moderately well drained, pH about 6.2 (slightly acidic).

Did spring come early in West Union, OH in 2026?

Spring leaf-out near 45693 came on Mar 9 in 2026, 10 days earlier than the 1991–2020 average (Mar 19), according to the USA National Phenology Network Spring Index.

What kind of onions grow in West Union, OH?

Intermediate onions: the longest day near 45693 is 14 h 53 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45693 change?

Yes. The 2012 USDA map put 45693 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.