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

Planting zone for 47525 — Derby, IN

ZIP code 47525 (Derby, Perry County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 2 and the first fall frost November 7.

Where ZIP 47525 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 2
First frostNov 7
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 Derby, IN…

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 Derby, IN

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 20only 10% chance of frost after
First fall frostNovember 7median — 10% chance by Oct 28
Growing season218 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 21 and returns around November 17.

From the NOAA station Cannelton, IN — 12 miles away, elevation 404 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 47525

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 12 – Sep 26
GarlicPlant cloves · Oct 24 – Nov 28
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 2) and first fall frost (Nov 7) 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 47525 came on Mar 3 — 6 days earlier than the 1991–2020 average (Mar 9).

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 Derby, IN

The soil mapped at the center of ZIP 47525 is Apalona — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter2%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Apalona-Zanesville silt loams, 6 to 12 percent slopes, severely 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 47525; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Derby, IN

Summer high87 °Faverage high, July
Winter low27 °Faverage low, January
Hot days25days a year at 90 °F or more
Freezing nights76nights a year at 32 °F or less
Growing degree days4,329base 50 °F — the season’s usable heat
Longest day14 h 48 mindaylight on June 21
Shortest day9 h 31 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation50.1 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 42 °F, low 27 °F 42°27° JanFebruary: average high 48 °F, low 29 °F 48°29° FebMarch: average high 55 °F, low 37 °F 55°37° MarApril: average high 68 °F, low 46 °F 68°46° AprMay: average high 76 °F, low 57 °F 76°57° MayJune: average high 83 °F, low 65 °F 83°65° JunJuly: average high 87 °F, low 69 °F 87°69° JulAugust: average high 86 °F, low 68 °F 86°68° AugSeptember: average high 81 °F, low 62 °F 81°62° SepOctober: average high 70 °F, low 50 °F 70°50° OctNovember: average high 57 °F, low 38 °F 57°38° NovDecember: average high 46 °F, low 31 °F 46°31° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.70 in precipitation 3.7 JanFebruary: 3.44 in precipitation 3.4 FebMarch: 4.79 in precipitation 4.8 MarApril: 5.22 in precipitation 5.2 AprMay: 5.69 in precipitation 5.7 MayJune: 4.72 in precipitation 4.7 JunJuly: 4.30 in precipitation 4.3 JulAugust: 2.99 in precipitation 3.0 AugSeptember: 3.53 in precipitation 3.5 SepOctober: 3.67 in precipitation 3.7 OctNovember: 3.90 in precipitation 3.9 NovDecember: 4.14 in precipitation 4.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Cannelton, IN (12 mi away); precipitation: Leopold 1.7 Ese, IN (5 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.

475747a
Rome, IN · 5 mi
401707a
Stephensport, KY · 5 mi
475516b
Leopold, IN · 7 mi
475867a
Tell City, IN · 7 mi
401717a
Union Star, KY · 8 mi
475207a
Cannelton, IN · 8 mi
401617a
Rhodelia, KY · 9 mi
475146b
Branchville, IN · 9 mi

Indiana planting zones →

Questions about 47525

What planting zone is ZIP code 47525?

ZIP code 47525 (Derby, IN) 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 Derby, IN?

The median last spring frost (32 °F) near 47525 is April 2; after April 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cannelton station.

When is the first frost in Derby, IN?

The median first fall frost near 47525 is November 7, giving a median frost-free growing season of 218 days.

When should I plant tomatoes in 47525?

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 47525 get?

About 50.1 inches of precipitation a year (NOAA 1991–2020 normals, Leopold 1.7 Ese station).

How hot do summers get in Derby, IN?

The average high peaks at 87 °F in July, with about 25 days a year at 90 °F or more.

What kind of soil does 47525 have?

The USDA soil survey maps Apalona at the center of ZIP 47525: silt loam, moderately well drained, pH about 5.9 (moderately acidic).

Did spring come early in Derby, IN in 2026?

Spring leaf-out near 47525 came on Mar 3 in 2026, 6 days earlier than the 1991–2020 average (Mar 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Derby, IN?

Intermediate onions: the longest day near 47525 is 14 h 48 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 47525 change?

Yes. The 2012 USDA map put 47525 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.