Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 74647 — Newkirk, OK

ZIP code 74647 (Newkirk, Kay County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 16 and the first fall frost October 26.

Where ZIP 74647 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 16

First frostOct 26

2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Newkirk, OK…

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 Newkirk, OK

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 16median — 50% chance of a later frost

Safe for tender plantsApril 30only 10% chance of frost after

First fall frostOctober 26median — 10% chance by Oct 11

Growing season192 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 5 and returns around November 3.

From the NOAA station Newkirk 5ne, OK — 2 miles away, elevation 1,142 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 74647

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 5 – Mar 19

SpinachSow outdoors · Mar 5 – Mar 26

Broccoli, cabbageStart indoors · Feb 5 – Feb 19

Broccoli, cabbageTransplant · Mar 26 – Apr 9

Onion setsPlant outdoors · Mar 19 – Apr 2

PotatoesPlant outdoors · Mar 26 – Apr 9

LettuceSow outdoors · Mar 19 – Apr 2

Carrots, beetsSow outdoors · Mar 26 – Apr 9

TomatoesStart indoors · Feb 19 – Mar 5

TomatoesTransplant · Apr 23 – May 7

Peppers, eggplantStart indoors · Feb 5 – Feb 19

Peppers, eggplantTransplant · Apr 30 – May 14

BeansSow outdoors · Apr 23 – May 7

Sweet cornSow outdoors · Apr 23 – May 7

Cucumbers, squashSow outdoors · Apr 23 – May 7

Fall lettuce, spinachSow outdoors · Aug 31 – Sep 14

GarlicPlant cloves · Oct 12 – Nov 16

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 16) and first fall frost (Oct 26) 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 74647 came on Feb 15 — 17 days earlier than the 1991–2020 average (Mar 4).

average
Mar 42026
Feb 15

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).

Native plants for zone 7a in Oklahoma

511 plants native to the lower 48 states, recorded in Oklahoma, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Newkirk, OK.

Soil in Newkirk, OK

The soil mapped at the center of ZIP 74647 is Agra — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables

pH7.0neutral; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter2%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classprime farmlandUSDA classification

Map unit: Agra-Foraker complex, 3 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 74647; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Newkirk, OK

Summer high92 °Faverage high, July

Winter low22 °Faverage low, January

Hot days61days a year at 90 °F or more

Freezing nights98nights a year at 32 °F or less

Growing degree days4,463base 50 °F — the season’s usable heat

Longest day14 h 42 mindaylight on June 21

Shortest day9 h 37 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation39.3 inper year, rain and melted snow

Snowfall9 inper year; 9 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Newkirk 5ne, OK (2 mi away); precipitation: Newkirk 5ne, OK (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

670057a

Arkansas City, KS · 10 mi

746417a

Kaw City, OK · 11 mi

671027a

Maple City, KS · 13 mi

746047a

Ponca City, OK · 15 mi

670517a

Geuda Springs, KS · 16 mi

746017a

Ponca City, OK · 17 mi

746027a

Ponca City, OK · 17 mi

746337a

Burbank, OK · 19 mi

Oklahoma planting zones →

Questions about 74647

What planting zone is ZIP code 74647?

ZIP code 74647 (Newkirk, OK) 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 Newkirk, OK?

The median last spring frost (32 °F) near 74647 is April 16; after April 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Newkirk 5ne station.

When is the first frost in Newkirk, OK?

The median first fall frost near 74647 is October 26, giving a median frost-free growing season of 192 days.

When should I plant tomatoes in 74647?

Start tomato seeds indoors around Feb 19 – Mar 5 and set transplants outside around Apr 23 – May 7, one to three weeks after the median last frost.

How much rain and snow does 74647 get?

About 39.3 inches of precipitation a year and 9 inches of snowfall (NOAA 1991–2020 normals, Newkirk 5ne station).

How hot do summers get in Newkirk, OK?

The average high peaks at 92 °F in July, with about 61 days a year at 90 °F or more.

What kind of soil does 74647 have?

The USDA soil survey maps Agra at the center of ZIP 74647: silt loam, moderately well drained, pH about 7.0 (neutral).

Did spring come early in Newkirk, OK in 2026?

Spring leaf-out near 74647 came on Feb 15 in 2026, 17 days earlier than the 1991–2020 average (Mar 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Newkirk, OK?

Intermediate onions: the longest day near 74647 is 14 h 42 min, so day-neutral types bulb best; long-day varieties may not bulb fully.