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

Planting zone for 62084 — Roxana, IL

ZIP code 62084 (Roxana, Madison County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 4 and the first fall frost November 5.

Where ZIP 62084 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 4
First frostNov 5
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 Roxana, 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 Roxana, IL

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 4median — 50% chance of a later frost
Safe for tender plantsApril 19only 10% chance of frost after
First fall frostNovember 5median — 10% chance by Oct 25
Growing season214 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 25 and returns around November 16.

From the NOAA station Alton - Melvin Price L&D, IL — 5 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 62084

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 21 – Mar 7
SpinachSow outdoors · Feb 21 – Mar 14
Broccoli, cabbageStart indoors · Jan 24 – Feb 7
Broccoli, cabbageTransplant · Mar 14 – Mar 28
Onion setsPlant outdoors · Mar 7 – Mar 21
PotatoesPlant outdoors · Mar 14 – Mar 28
LettuceSow outdoors · Mar 7 – Mar 21
Carrots, beetsSow outdoors · Mar 14 – Mar 28
TomatoesStart indoors · Feb 7 – Feb 21
TomatoesTransplant · Apr 11 – Apr 25
Peppers, eggplantStart indoors · Jan 24 – Feb 7
Peppers, eggplantTransplant · Apr 18 – May 2
BeansSow outdoors · Apr 11 – Apr 25
Sweet cornSow outdoors · Apr 11 – Apr 25
Cucumbers, squashSow outdoors · Apr 11 – Apr 25
Fall lettuce, spinachSow outdoors · Sep 10 – Sep 24
GarlicPlant cloves · Oct 22 – Nov 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 4) and first fall frost (Nov 5) 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 62084 came on Mar 6 — 10 days earlier than the 1991–2020 average (Mar 16).

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 Roxana, IL

The center of ZIP 62084 is mapped as Urban land: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

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 62084; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Roxana, IL

Summer high87 °Faverage high, July
Winter low22 °Faverage low, January
Hot days29days a year at 90 °F or more
Freezing nights85nights a year at 32 °F or less
Growing degree days4,168base 50 °F — the season’s usable heat
Longest day14 h 53 mindaylight on June 21
Shortest day9 h 26 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation45.9 inper year, rain and melted snow
Snowfall11 inper year; 15 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 39 °F, low 22 °F 39°22° JanFebruary: average high 44 °F, low 25 °F 44°25° FebMarch: average high 54 °F, low 35 °F 54°35° MarApril: average high 66 °F, low 45 °F 66°45° AprMay: average high 75 °F, low 56 °F 75°56° MayJune: average high 84 °F, low 66 °F 84°66° JunJuly: average high 87 °F, low 69 °F 87°69° JulAugust: average high 86 °F, low 67 °F 86°67° AugSeptember: average high 80 °F, low 60 °F 80°60° SepOctober: average high 68 °F, low 48 °F 68°48° OctNovember: average high 54 °F, low 37 °F 54°37° NovDecember: average high 44 °F, low 27 °F 44°27° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 2.78 in precipitation, 3.7 in snowfall 2.8❄4 JanFebruary: 2.32 in precipitation, 2.5 in snowfall 2.3❄3 FebMarch: 3.45 in precipitation, 1 in snowfall 3.5❄1 MarApril: 5.10 in precipitation, 0.1 in snowfall 5.1 AprMay: 5.49 in precipitation 5.5 MayJune: 4.71 in precipitation 4.7 JunJuly: 4.76 in precipitation 4.8 JulAugust: 4.02 in precipitation 4.0 AugSeptember: 3.26 in precipitation 3.3 SepOctober: 3.41 in precipitation 3.4 OctNovember: 3.79 in precipitation, 0.2 in snowfall 3.8 NovDecember: 2.76 in precipitation, 3.3 in snowfall 2.8❄3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Alton - Melvin Price L&D, IL (5 mi away); precipitation: Edwardsville 2 W, IL (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

620957a
Wood River, IL · 2 mi
620877a
South Roxana, IL · 2 mi
620247a
East Alton, IL · 3 mi
620267a
Edwardsville, IL · 5 mi
620187a
Cottage Hills, IL · 5 mi
620106b
Bethalto, IL · 5 mi
620487a
Hartford, IL · 6 mi
620257a
Edwardsville, IL · 7 mi

Illinois planting zones →

Questions about 62084

What planting zone is ZIP code 62084?

ZIP code 62084 (Roxana, 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 Roxana, IL?

The median last spring frost (32 °F) near 62084 is April 4; after April 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Alton - Melvin Price L&D station.

When is the first frost in Roxana, IL?

The median first fall frost near 62084 is November 5, giving a median frost-free growing season of 214 days.

When should I plant tomatoes in 62084?

Start tomato seeds indoors around Feb 7 – Feb 21 and set transplants outside around Apr 11 – Apr 25, one to three weeks after the median last frost.

How much rain and snow does 62084 get?

About 45.9 inches of precipitation a year and 11 inches of snowfall (NOAA 1991–2020 normals, Edwardsville 2 W station).

How hot do summers get in Roxana, IL?

The average high peaks at 87 °F in July, with about 29 days a year at 90 °F or more.

Did spring come early in Roxana, IL in 2026?

Spring leaf-out near 62084 came on Mar 6 in 2026, 10 days earlier than the 1991–2020 average (Mar 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Roxana, IL?

Intermediate onions: the longest day near 62084 is 14 h 53 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 62084 change?

Yes. The 2012 USDA map put 62084 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.