Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 62867 — New Haven, IL

ZIP code 62867 (New Haven, Gallatin County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 5 and the first fall frost October 31.

Where ZIP 62867 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostApr 5

First frostOct 31

2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for New Haven, 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 New Haven, IL

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 5median — 50% chance of a later frost

Safe for tender plantsApril 21only 10% chance of frost after

First fall frostOctober 31median — 10% chance by Oct 19

Growing season209 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 24 and returns around November 8.

From the NOAA station Jt Myers Locks & Dam, IN — 10 miles away, elevation 341 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 62867

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 22 – Mar 8

SpinachSow outdoors · Feb 22 – Mar 15

Broccoli, cabbageStart indoors · Jan 25 – Feb 8

Broccoli, cabbageTransplant · Mar 15 – Mar 29

Onion setsPlant outdoors · Mar 8 – Mar 22

PotatoesPlant outdoors · Mar 15 – Mar 29

LettuceSow outdoors · Mar 8 – Mar 22

Carrots, beetsSow outdoors · Mar 15 – Mar 29

TomatoesStart indoors · Feb 8 – Feb 22

TomatoesTransplant · Apr 12 – Apr 26

Peppers, eggplantStart indoors · Jan 25 – Feb 8

Peppers, eggplantTransplant · Apr 19 – May 3

BeansSow outdoors · Apr 12 – Apr 26

Sweet cornSow outdoors · Apr 12 – Apr 26

Cucumbers, squashSow outdoors · Apr 12 – Apr 26

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 5) 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 62867 came on Mar 5 — 5 days earlier than the 1991–2020 average (Mar 10).

average
Mar 102026
Mar 5

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).

Native plants for zone 7a in Illinois

633 plants native to the lower 48 states, recorded in Illinois, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in New Haven, IL.

Soil in New Haven, IL

The soil mapped at the center of ZIP 62867 is Newark — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables

pH5.9moderately acidic; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter3%moderate

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classPrime farmland if drained and either protected from flooding or not frequently flooded during the growing seasonUSDA classification

Map unit: Newark silt loam, 0 to 2 percent slopes, frequently flooded.

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 62867; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in New Haven, IL

Summer high88 °Faverage high, July

Winter low26 °Faverage low, January

Hot days44days a year at 90 °F or more

Freezing nights80nights a year at 32 °F or less

Growing degree days4,262base 50 °F — the season’s usable heat

Longest day14 h 48 mindaylight on June 21

Shortest day9 h 32 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation48.2 inper year, rain and melted snow

Snowfall8 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Jt Myers Locks & Dam, IN (10 mi away); precipitation: Jt Myers Locks & Dam, IN (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

Norris City, IL · 10 mi

476207a

Mount Vernon, IN · 11 mi

628217a

Carmi, IL · 11 mi

629847a

Shawneetown, IL · 11 mi

Illinois planting zones →

Questions about 62867

What planting zone is ZIP code 62867?

ZIP code 62867 (New Haven, IL) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in New Haven, IL?

The median last spring frost (32 °F) near 62867 is April 5; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Jt Myers Locks & Dam station.

When is the first frost in New Haven, IL?

The median first fall frost near 62867 is October 31, giving a median frost-free growing season of 209 days.

When should I plant tomatoes in 62867?

Start tomato seeds indoors around Feb 8 – Feb 22 and set transplants outside around Apr 12 – Apr 26, one to three weeks after the median last frost.

How much rain and snow does 62867 get?

About 48.2 inches of precipitation a year and 8 inches of snowfall (NOAA 1991–2020 normals, Jt Myers Locks & Dam station).

How hot do summers get in New Haven, IL?

The average high peaks at 88 °F in July, with about 44 days a year at 90 °F or more.

What kind of soil does 62867 have?

The USDA soil survey maps Newark at the center of ZIP 62867: silt loam, somewhat poorly drained, pH about 5.9 (moderately acidic).

Did spring come early in New Haven, IL in 2026?

Spring leaf-out near 62867 came on Mar 5 in 2026, 5 days earlier than the 1991–2020 average (Mar 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in New Haven, IL?

Intermediate onions: the longest day near 62867 is 14 h 48 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 62867 change?

Yes. The 2012 USDA map put 62867 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.