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

Planting zone for 62852 — Keensburg, IL

ZIP code 62852 (Keensburg, Wabash County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 2 and the first fall frost October 31.

Where ZIP 62852 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 2
First frostOct 31
2012 zone6b

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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Keensburg, IL…

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 Keensburg, IL

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 2median — 50% chance of a later frost
Safe for tender plantsApril 17only 10% chance of frost after
First fall frostOctober 31median — 10% chance by Oct 18
Growing season209 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 22 and returns around November 11.

From the NOAA station Mt Carmel, IL — 7 miles away, elevation 430 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 62852

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 19 – Mar 5
SpinachSow outdoors · Feb 19 – Mar 12
Broccoli, cabbageStart indoors · Jan 22 – Feb 5
Broccoli, cabbageTransplant · Mar 12 – Mar 26
Onion setsPlant outdoors · Mar 5 – Mar 19
PotatoesPlant outdoors · Mar 12 – Mar 26
LettuceSow outdoors · Mar 5 – Mar 19
Carrots, beetsSow outdoors · Mar 12 – Mar 26
TomatoesStart indoors · Feb 5 – Feb 19
TomatoesTransplant · Apr 9 – Apr 23
Peppers, eggplantStart indoors · Jan 22 – Feb 5
Peppers, eggplantTransplant · Apr 16 – Apr 30
BeansSow outdoors · Apr 9 – Apr 23
Sweet cornSow outdoors · Apr 9 – Apr 23
Cucumbers, squashSow outdoors · Apr 9 – Apr 23
Fall lettuce, spinachSow outdoors · Sep 5 – Sep 19
GarlicPlant cloves · Oct 17 – Nov 21
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 2) and first fall frost (Oct 31) 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 62852 came on Mar 6 — 9 days earlier than the 1991–2020 average (Mar 15).

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 Keensburg, IL

The soil mapped at the center of ZIP 62852 is Alvin — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Alvin fine sandy loam, 7 to 12 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 62852; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Keensburg, IL

Summer high87 °Faverage high, July
Winter low25 °Faverage low, January
Hot days46days a year at 90 °F or more
Freezing nights108nights a year at 32 °F or less
Growing degree days4,258base 50 °F — the season’s usable heat
Longest day14 h 50 mindaylight on June 21
Shortest day9 h 29 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation48.7 inper year, rain and melted snow
Snowfall9 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 25 °F 40°25° JanFebruary: average high 45 °F, low 27 °F 45°27° FebMarch: average high 55 °F, low 36 °F 55°36° MarApril: average high 67 °F, low 46 °F 67°46° AprMay: average high 76 °F, low 57 °F 76°57° MayJune: average high 85 °F, low 66 °F 85°66° JunJuly: average high 87 °F, low 69 °F 87°69° JulAugust: average high 86 °F, low 67 °F 86°67° AugSeptember: average high 81 °F, low 59 °F 81°59° SepOctober: average high 69 °F, low 47 °F 69°47° OctNovember: average high 55 °F, low 36 °F 55°36° NovDecember: average high 44 °F, low 28 °F 44°28° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 3.58 in precipitation, 2.3 in snowfall 3.6❄2 JanFebruary: 3.09 in precipitation, 2.5 in snowfall 3.1❄3 FebMarch: 4.06 in precipitation, 1.2 in snowfall 4.1❄1 MarApril: 5.08 in precipitation 5.1 AprMay: 5.83 in precipitation 5.8 MayJune: 4.70 in precipitation 4.7 JunJuly: 4.47 in precipitation 4.5 JulAugust: 3.24 in precipitation 3.2 AugSeptember: 3.51 in precipitation 3.5 SepOctober: 3.79 in precipitation, 0.1 in snowfall 3.8 OctNovember: 3.93 in precipitation 3.9 NovDecember: 3.45 in precipitation, 2.8 in snowfall 3.5❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Mt Carmel, IL (7 mi away); precipitation: Mt Carmel, IL (7 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.

628116b
Bellmont, IL · 3 mi
628636b
Mount Carmel, IL · 5 mi
628186b
Browns, IL · 6 mi
476167a
Griffin, IN · 8 mi
476656b
Owensville, IN · 9 mi
628156b
Bone Gap, IL · 9 mi
628447a
Grayville, IL · 12 mi
628066b
Albion, IL · 12 mi

Illinois planting zones →

Questions about 62852

What planting zone is ZIP code 62852?

ZIP code 62852 (Keensburg, IL) 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 Keensburg, IL?

The median last spring frost (32 °F) near 62852 is April 2; after April 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mt Carmel station.

When is the first frost in Keensburg, IL?

The median first fall frost near 62852 is October 31, giving a median frost-free growing season of 209 days.

When should I plant tomatoes in 62852?

Start tomato seeds indoors around Feb 5 – Feb 19 and set transplants outside around Apr 9 – Apr 23, one to three weeks after the median last frost.

How much rain and snow does 62852 get?

About 48.7 inches of precipitation a year and 9 inches of snowfall (NOAA 1991–2020 normals, Mt Carmel station).

How hot do summers get in Keensburg, IL?

The average high peaks at 87 °F in July, with about 46 days a year at 90 °F or more.

What kind of soil does 62852 have?

The USDA soil survey maps Alvin at the center of ZIP 62852: fine sandy loam, well drained, pH about 5.9 (moderately acidic).

Did spring come early in Keensburg, IL in 2026?

Spring leaf-out near 62852 came on Mar 6 in 2026, 9 days earlier than the 1991–2020 average (Mar 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Keensburg, IL?

Intermediate onions: the longest day near 62852 is 14 h 50 min, so day-neutral types bulb best; long-day varieties may not bulb fully.