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

Planting zone for 65607 — Caplinger Mills, MO

ZIP code 65607 (Caplinger Mills, Cedar County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 6 and the first fall frost October 30.

Where ZIP 65607 is

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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 6
First frostOct 30
2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Caplinger Mills, MO…

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 Caplinger Mills, MO

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 6median — 50% chance of a later frost
Safe for tender plantsApril 23only 10% chance of frost after
First fall frostOctober 30median — 10% chance by Oct 17
Growing season207 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 8.

From the NOAA station Stockton Dam, MO — 7 miles away, elevation 922 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 65607

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 23 – Mar 9
SpinachSow outdoors · Feb 23 – Mar 16
Broccoli, cabbageStart indoors · Jan 26 – Feb 9
Broccoli, cabbageTransplant · Mar 16 – Mar 30
Onion setsPlant outdoors · Mar 9 – Mar 23
PotatoesPlant outdoors · Mar 16 – Mar 30
LettuceSow outdoors · Mar 9 – Mar 23
Carrots, beetsSow outdoors · Mar 16 – Mar 30
TomatoesStart indoors · Feb 9 – Feb 23
TomatoesTransplant · Apr 13 – Apr 27
Peppers, eggplantStart indoors · Jan 26 – Feb 9
Peppers, eggplantTransplant · Apr 20 – May 4
BeansSow outdoors · Apr 13 – Apr 27
Sweet cornSow outdoors · Apr 13 – Apr 27
Cucumbers, squashSow outdoors · Apr 13 – Apr 27
Fall lettuce, spinachSow outdoors · Sep 4 – Sep 18
GarlicPlant cloves · Oct 16 – Nov 20
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 6) and first fall frost (Oct 30) 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 65607 came on Feb 24 — 15 days earlier than the 1991–2020 average (Mar 11).

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 Caplinger Mills, MO

The soil mapped at the center of ZIP 65607 is Courtois — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH7.1neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.9%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classprime farmlandUSDA classification

Map unit: Courtois silt loam, 2 to 5 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 65607; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Caplinger Mills, MO

Summer high90 °Faverage high, July
Winter low23 °Faverage low, January
Hot days44days a year at 90 °F or more
Freezing nights92nights a year at 32 °F or less
Growing degree days4,495base 50 °F — the season’s usable heat
Longest day14 h 47 mindaylight on June 21
Shortest day9 h 33 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation43.5 inper year, rain and melted snow
Snowfall7 inper year; 1 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 43 °F, low 23 °F 43°23° JanFebruary: average high 48 °F, low 27 °F 48°27° FebMarch: average high 58 °F, low 35 °F 58°35° MarApril: average high 68 °F, low 45 °F 68°45° AprMay: average high 76 °F, low 56 °F 76°56° MayJune: average high 85 °F, low 66 °F 85°66° JunJuly: average high 90 °F, low 70 °F 90°70° JulAugust: average high 90 °F, low 68 °F 90°68° AugSeptember: average high 82 °F, low 60 °F 82°60° SepOctober: average high 71 °F, low 48 °F 71°48° OctNovember: average high 58 °F, low 37 °F 58°37° NovDecember: average high 47 °F, low 28 °F 47°28° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 1.74 in precipitation, 2.8 in snowfall 1.7❄3 JanFebruary: 2.20 in precipitation, 1.1 in snowfall 2.2❄1 FebMarch: 3.19 in precipitation, 0.8 in snowfall 3.2❄1 MarApril: 4.62 in precipitation 4.6 AprMay: 5.76 in precipitation 5.8 MayJune: 5.28 in precipitation 5.3 JunJuly: 4.14 in precipitation 4.1 JulAugust: 3.42 in precipitation 3.4 AugSeptember: 3.76 in precipitation 3.8 SepOctober: 3.86 in precipitation 3.9 OctNovember: 3.41 in precipitation, 0.3 in snowfall 3.4 NovDecember: 2.14 in precipitation, 2.4 in snowfall 2.1❄2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Stockton Dam, MO (7 mi away); precipitation: Caplinger Mills, MO (within 1 mile). 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.

657857a
Stockton, MO · 6 mi
647446b
El Dorado Springs, MO · 10 mi
656746b
Humansville, MO · 11 mi
647386b
Collins, MO · 11 mi
647816b
Roscoe, MO · 13 mi
656406b
Dunnegan, MO · 15 mi
656496b
Fair Play, MO · 16 mi
647567a
Jerico Springs, MO · 17 mi

Missouri planting zones →

Questions about 65607

What planting zone is ZIP code 65607?

ZIP code 65607 (Caplinger Mills, MO) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Caplinger Mills, MO?

The median last spring frost (32 °F) near 65607 is April 6; after April 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Stockton Dam station.

When is the first frost in Caplinger Mills, MO?

The median first fall frost near 65607 is October 30, giving a median frost-free growing season of 207 days.

When should I plant tomatoes in 65607?

Start tomato seeds indoors around Feb 9 – Feb 23 and set transplants outside around Apr 13 – Apr 27, one to three weeks after the median last frost.

How much rain and snow does 65607 get?

About 43.5 inches of precipitation a year and 7 inches of snowfall (NOAA 1991–2020 normals, Caplinger Mills station).

How hot do summers get in Caplinger Mills, MO?

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

What kind of soil does 65607 have?

The USDA soil survey maps Courtois at the center of ZIP 65607: silt loam, well drained, pH about 7.1 (neutral).

Did spring come early in Caplinger Mills, MO in 2026?

Spring leaf-out near 65607 came on Feb 24 in 2026, 15 days earlier than the 1991–2020 average (Mar 11), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Caplinger Mills, MO?

Intermediate onions: the longest day near 65607 is 14 h 47 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 65607 change?

Yes. The 2012 USDA map put 65607 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.