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

Planting zone for 62254 — Lebanon, IL

ZIP code 62254 (Lebanon, St. Clair County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 12 and the first fall frost October 20.

Where ZIP 62254 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 12
First frostOct 20
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 Lebanon, 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 Lebanon, IL

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 12median — 50% chance of a later frost
Safe for tender plantsApril 28only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 3
Growing season189 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 31 and returns around October 30.

From the NOAA station Belleville Siu Rsch, IL — 6 miles away, elevation 449 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 62254

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 1 – Mar 15
SpinachSow outdoors · Mar 1 – Mar 22
Broccoli, cabbageStart indoors · Feb 1 – Feb 15
Broccoli, cabbageTransplant · Mar 22 – Apr 5
Onion setsPlant outdoors · Mar 15 – Mar 29
PotatoesPlant outdoors · Mar 22 – Apr 5
LettuceSow outdoors · Mar 15 – Mar 29
Carrots, beetsSow outdoors · Mar 22 – Apr 5
TomatoesStart indoors · Feb 15 – Mar 1
TomatoesTransplant · Apr 19 – May 3
Peppers, eggplantStart indoors · Feb 1 – Feb 15
Peppers, eggplantTransplant · Apr 26 – May 10
BeansSow outdoors · Apr 19 – May 3
Sweet cornSow outdoors · Apr 19 – May 3
Cucumbers, squashSow outdoors · Apr 19 – May 3
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 (Apr 12) 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 62254 came on Mar 3 — 12 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 Lebanon, IL

The soil mapped at the center of ZIP 62254 is Winfield — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Winfield silt loam, 5 to 10 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 62254; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lebanon, IL

Summer high90 °Faverage high, July
Winter low24 °Faverage low, January
Hot days53days a year at 90 °F or more
Freezing nights93nights a year at 32 °F or less
Growing degree days4,520base 50 °F — the season’s usable heat
Longest day14 h 52 mindaylight on June 21
Shortest day9 h 28 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation43.4 inper year, rain and melted snow
Snowfall11 inper year; 12 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 43 °F, low 24 °F 43°24° JanFebruary: average high 49 °F, low 28 °F 49°28° FebMarch: average high 59 °F, low 36 °F 59°36° MarApril: average high 71 °F, low 46 °F 71°46° AprMay: average high 79 °F, low 56 °F 79°56° MayJune: average high 87 °F, low 65 °F 87°65° JunJuly: average high 90 °F, low 68 °F 90°68° JulAugust: average high 89 °F, low 65 °F 89°65° AugSeptember: average high 83 °F, low 57 °F 83°57° SepOctober: average high 73 °F, low 47 °F 73°47° OctNovember: average high 58 °F, low 37 °F 58°37° NovDecember: average high 46 °F, low 28 °F 46°28° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 2.56 in precipitation, 3.4 in snowfall 2.6❄3 JanFebruary: 2.16 in precipitation, 3.3 in snowfall 2.2❄3 FebMarch: 3.44 in precipitation, 1 in snowfall 3.4❄1 MarApril: 4.90 in precipitation 4.9 AprMay: 5.05 in precipitation 5.0 MayJune: 4.62 in precipitation 4.6 JunJuly: 4.03 in precipitation 4.0 JulAugust: 3.92 in precipitation 3.9 AugSeptember: 3.35 in precipitation 3.4 SepOctober: 3.12 in precipitation 3.1 OctNovember: 3.60 in precipitation, 0.6 in snowfall 3.6❄1 NovDecember: 2.61 in precipitation, 2.9 in snowfall 2.6❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Belleville Siu Rsch, IL (6 mi away); precipitation: Belleville Siu Rsch, IL (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

5 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

622896b
Summerfield, IL · 4 mi
622256b
Scott Air Force Base, IL · 5 mi
622697a
O Fallon, IL · 5 mi
622947a
Troy, IL · 7 mi
622936b
Trenton, IL · 7 mi
622817a
Saint Jacob, IL · 7 mi
622217a
Belleville, IL · 8 mi
622087a
Fairview Heights, IL · 10 mi

Illinois planting zones →

Questions about 62254

What planting zone is ZIP code 62254?

ZIP code 62254 (Lebanon, 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 Lebanon, IL?

The median last spring frost (32 °F) near 62254 is April 12; after April 28 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Belleville Siu Rsch station.

When is the first frost in Lebanon, IL?

The median first fall frost near 62254 is October 20, giving a median frost-free growing season of 189 days.

When should I plant tomatoes in 62254?

Start tomato seeds indoors around Feb 15 – Mar 1 and set transplants outside around Apr 19 – May 3, one to three weeks after the median last frost.

How much rain and snow does 62254 get?

About 43.4 inches of precipitation a year and 11 inches of snowfall (NOAA 1991–2020 normals, Belleville Siu Rsch station).

How hot do summers get in Lebanon, IL?

The average high peaks at 90 °F in July, with about 53 days a year at 90 °F or more.

What kind of soil does 62254 have?

The USDA soil survey maps Winfield at the center of ZIP 62254: silt loam, moderately well drained, pH about 5.6 (moderately acidic).

Did spring come early in Lebanon, IL in 2026?

Spring leaf-out near 62254 came on Mar 3 in 2026, 12 days earlier than the 1991–2020 average (Mar 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Lebanon, IL?

Intermediate onions: the longest day near 62254 is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.