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

Planting zone for 61419 — Bishop Hill, IL

ZIP code 61419 (Bishop Hill, Henry County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is April 26 and the first fall frost October 12.

Where ZIP 61419 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.

Zone5b−15 to −10 °F
Coldest night−26.1 to −23.3 °C
Last frostApr 26
First frostOct 12
2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bishop Hill, 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 Bishop Hill, IL

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 26median — 50% chance of a later frost
Safe for tender plantsMay 11only 10% chance of frost after
First fall frostOctober 12median — 10% chance by Sep 25
Growing season166 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 16 and returns around October 22.

From the NOAA station Galva, IL — 4 miles away, elevation 810 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 61419

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 15 – Mar 29
SpinachSow outdoors · Mar 15 – Apr 5
Broccoli, cabbageStart indoors · Feb 15 – Mar 1
Broccoli, cabbageTransplant · Apr 5 – Apr 19
Onion setsPlant outdoors · Mar 29 – Apr 12
PotatoesPlant outdoors · Apr 5 – Apr 19
LettuceSow outdoors · Mar 29 – Apr 12
Carrots, beetsSow outdoors · Apr 5 – Apr 19
TomatoesStart indoors · Mar 1 – Mar 15
TomatoesTransplant · May 3 – May 17
Peppers, eggplantStart indoors · Feb 15 – Mar 1
Peppers, eggplantTransplant · May 10 – May 24
BeansSow outdoors · May 3 – May 17
Sweet cornSow outdoors · May 3 – May 17
Cucumbers, squashSow outdoors · May 3 – May 17
Fall lettuce, spinachSow outdoors · Aug 17 – Aug 31
GarlicPlant cloves · Sep 28 – Nov 2
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 26) and first fall frost (Oct 12) 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 61419 came on Mar 15 — 20 days earlier than the 1991–2020 average (Apr 4).

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 Bishop Hill, IL

The soil mapped at the center of ZIP 61419 is Ipava — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter4.25%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classprime farmlandUSDA classification

Map unit: Ipava silt loam, 0 to 2 percent slopes.

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 61419; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bishop Hill, IL

Summer high84 °Faverage high, July
Winter low13 °Faverage low, January
Hot days16days a year at 90 °F or more
Freezing nights137nights a year at 32 °F or less
Growing degree days3,123base 50 °F — the season’s usable heat
Longest day15 h 09 mindaylight on June 21
Shortest day9 h 12 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation38.7 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 30 °F, low 13 °F 30°13° JanFebruary: average high 35 °F, low 17 °F 35°17° FebMarch: average high 48 °F, low 27 °F 48°27° MarApril: average high 61 °F, low 38 °F 61°38° AprMay: average high 73 °F, low 50 °F 73°50° MayJune: average high 82 °F, low 60 °F 82°60° JunJuly: average high 84 °F, low 63 °F 84°63° JulAugust: average high 82 °F, low 60 °F 82°60° AugSeptember: average high 77 °F, low 52 °F 77°52° SepOctober: average high 64 °F, low 40 °F 64°40° OctNovember: average high 48 °F, low 29 °F 48°29° NovDecember: average high 36 °F, low 19 °F 36°19° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 1.62 in precipitation 1.6 JanFebruary: 1.76 in precipitation 1.8 FebMarch: 2.35 in precipitation 2.4 MarApril: 4.22 in precipitation 4.2 AprMay: 4.82 in precipitation 4.8 MayJune: 5.17 in precipitation 5.2 JunJuly: 3.63 in precipitation 3.6 JulAugust: 3.73 in precipitation 3.7 AugSeptember: 3.97 in precipitation 4.0 SepOctober: 2.84 in precipitation 2.8 OctNovember: 2.55 in precipitation 2.5 NovDecember: 2.01 in precipitation 2.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Galva, IL (4 mi away); precipitation: Galva, IL (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

614345b
Galva, IL · 5 mi
614145b
Altona, IL · 5 mi
612385b
Cambridge, IL · 6 mi
614905b
Woodhull, IL · 7 mi
614435b
Kewanee, IL · 10 mi
614495b
La Fayette, IL · 10 mi
614675b
Oneida, IL · 11 mi
612335b
Andover, IL · 11 mi

Illinois planting zones →

Questions about 61419

What planting zone is ZIP code 61419?

ZIP code 61419 (Bishop Hill, IL) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Bishop Hill, IL?

The median last spring frost (32 °F) near 61419 is April 26; after May 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Galva station.

When is the first frost in Bishop Hill, IL?

The median first fall frost near 61419 is October 12, giving a median frost-free growing season of 166 days.

When should I plant tomatoes in 61419?

Start tomato seeds indoors around Mar 1 – Mar 15 and set transplants outside around May 3 – May 17, one to three weeks after the median last frost.

How much rain and snow does 61419 get?

About 38.7 inches of precipitation a year (NOAA 1991–2020 normals, Galva station).

How hot do summers get in Bishop Hill, IL?

The average high peaks at 84 °F in July, with about 16 days a year at 90 °F or more.

What kind of soil does 61419 have?

The USDA soil survey maps Ipava at the center of ZIP 61419: silt loam, somewhat poorly drained, pH about 5.8 (moderately acidic).

Did spring come early in Bishop Hill, IL in 2026?

Spring leaf-out near 61419 came on Mar 15 in 2026, 20 days earlier than the 1991–2020 average (Apr 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bishop Hill, IL?

Long-day onions: the longest day near 61419 is 15 h 09 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).