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

Planting zone for 62325 — Coatsburg, IL

ZIP code 62325 (Coatsburg, Adams County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 14 and the first fall frost October 23.

Where ZIP 62325 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostApr 14
First frostOct 23
2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Coatsburg, 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 Coatsburg, IL

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 14median — 50% chance of a later frost
Safe for tender plantsMay 1only 10% chance of frost after
First fall frostOctober 23median — 10% chance by Oct 10
Growing season191 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 1.

From the NOAA station Quincy Regional Airport, IL — 7 miles away, elevation 768 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 62325

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 3 – Mar 17
SpinachSow outdoors · Mar 3 – Mar 24
Broccoli, cabbageStart indoors · Feb 3 – Feb 17
Broccoli, cabbageTransplant · Mar 24 – Apr 7
Onion setsPlant outdoors · Mar 17 – Mar 31
PotatoesPlant outdoors · Mar 24 – Apr 7
LettuceSow outdoors · Mar 17 – Mar 31
Carrots, beetsSow outdoors · Mar 24 – Apr 7
TomatoesStart indoors · Feb 17 – Mar 3
TomatoesTransplant · Apr 21 – May 5
Peppers, eggplantStart indoors · Feb 3 – Feb 17
Peppers, eggplantTransplant · Apr 28 – May 12
BeansSow outdoors · Apr 21 – May 5
Sweet cornSow outdoors · Apr 21 – May 5
Cucumbers, squashSow outdoors · Apr 21 – May 5
Fall lettuce, spinachSow outdoors · Aug 28 – Sep 11
GarlicPlant cloves · Oct 9 – Nov 13
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 14) and first fall frost (Oct 23) 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 62325 came on Mar 10 — 16 days earlier than the 1991–2020 average (Mar 26).

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 Coatsburg, IL

The soil mapped at the center of ZIP 62325 is Hickory — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH6.2slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Hickory silt loam, cool mesic, 18 to 25 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 62325; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Coatsburg, IL

Summer high86 °Faverage high, July
Winter low19 °Faverage low, January
Hot days24days a year at 90 °F or more
Freezing nights112nights a year at 32 °F or less
Growing degree days3,691base 50 °F — the season’s usable heat
Longest day15 h 01 mindaylight on June 21
Shortest day9 h 19 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation36.4 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 35 °F, low 19 °F 35°19° JanFebruary: average high 40 °F, low 23 °F 40°23° FebMarch: average high 52 °F, low 32 °F 52°32° MarApril: average high 64 °F, low 43 °F 64°43° AprMay: average high 73 °F, low 54 °F 73°54° MayJune: average high 82 °F, low 63 °F 82°63° JunJuly: average high 86 °F, low 67 °F 86°67° JulAugust: average high 85 °F, low 65 °F 85°65° AugSeptember: average high 78 °F, low 56 °F 78°56° SepOctober: average high 65 °F, low 45 °F 65°45° OctNovember: average high 51 °F, low 33 °F 51°33° NovDecember: average high 39 °F, low 24 °F 39°24° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 1.57 in precipitation 1.6 JanFebruary: 1.77 in precipitation 1.8 FebMarch: 2.29 in precipitation 2.3 MarApril: 3.98 in precipitation 4.0 AprMay: 4.55 in precipitation 4.5 MayJune: 4.50 in precipitation 4.5 JunJuly: 3.49 in precipitation 3.5 JulAugust: 3.93 in precipitation 3.9 AugSeptember: 3.09 in precipitation 3.1 SepOctober: 3.05 in precipitation 3.0 OctNovember: 2.41 in precipitation 2.4 NovDecember: 1.80 in precipitation 1.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Quincy Regional Airport, IL (7 mi away); precipitation: Quincy Regional Airport, IL (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

623596a
Paloma, IL · 3 mi
623206a
Camp Point, IL · 4 mi
623386a
Fowler, IL · 5 mi
623516a
Mendon, IL · 7 mi
623396a
Golden, IL · 9 mi
623496a
Loraine, IL · 9 mi
623246a
Clayton, IL · 11 mi
623056a
Quincy, IL · 13 mi

Illinois planting zones →

Questions about 62325

What planting zone is ZIP code 62325?

ZIP code 62325 (Coatsburg, IL) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Coatsburg, IL?

The median last spring frost (32 °F) near 62325 is April 14; after May 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Quincy Regional Airport station.

When is the first frost in Coatsburg, IL?

The median first fall frost near 62325 is October 23, giving a median frost-free growing season of 191 days.

When should I plant tomatoes in 62325?

Start tomato seeds indoors around Feb 17 – Mar 3 and set transplants outside around Apr 21 – May 5, one to three weeks after the median last frost.

How much rain and snow does 62325 get?

About 36.4 inches of precipitation a year (NOAA 1991–2020 normals, Quincy Regional Airport station).

How hot do summers get in Coatsburg, IL?

The average high peaks at 86 °F in July, with about 24 days a year at 90 °F or more.

What kind of soil does 62325 have?

The USDA soil survey maps Hickory at the center of ZIP 62325: silt loam, well drained, pH about 6.2 (slightly acidic).

Did spring come early in Coatsburg, IL in 2026?

Spring leaf-out near 62325 came on Mar 10 in 2026, 16 days earlier than the 1991–2020 average (Mar 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Coatsburg, IL?

Long-day onions: the longest day near 62325 is 15 h 01 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 62325 change?

Yes. The 2012 USDA map put 62325 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.