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

Planting zone for 73045 — Harrah, OK

ZIP code 73045 (Harrah, Oklahoma County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 4 and the first fall frost October 30.

Where ZIP 73045 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostApr 4
First frostOct 30
2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Harrah, 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 Harrah, OK

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 21only 10% chance of frost after
First fall frostOctober 30median — 10% chance by Oct 18
Growing season208 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 25 and returns around November 7.

From the NOAA station Meeker 5 W, OK — 9 miles away, elevation 925 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 73045

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 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 4) 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 73045 came on Feb 12 — 10 days earlier than the 1991–2020 average (Feb 22).

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 Harrah, OK

The soil mapped at the center of ZIP 73045 is Harrah — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH5.9moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.25%moderate
Hydrologic groupBwater soaks in moderately
Farmland classprime farmlandUSDA classification

Map unit: Harrah fine sandy loam, 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 73045; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Harrah, OK

Summer high92 °Faverage high, July
Winter low27 °Faverage low, January
Hot days59days a year at 90 °F or more
Freezing nights83nights a year at 32 °F or less
Growing degree days4,934base 50 °F — the season’s usable heat
Longest day14 h 34 mindaylight on June 21
Shortest day9 h 45 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation38.5 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 49 °F, low 27 °F 49°27° JanFebruary: average high 54 °F, low 30 °F 54°30° FebMarch: average high 63 °F, low 38 °F 63°38° MarApril: average high 71 °F, low 47 °F 71°47° AprMay: average high 78 °F, low 58 °F 78°58° MayJune: average high 86 °F, low 67 °F 86°67° JunJuly: average high 92 °F, low 71 °F 92°71° JulAugust: average high 91 °F, low 69 °F 91°69° AugSeptember: average high 84 °F, low 61 °F 84°61° SepOctober: average high 73 °F, low 49 °F 73°49° OctNovember: average high 62 °F, low 38 °F 62°38° NovDecember: average high 51 °F, low 30 °F 51°30° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 1.48 in precipitation 1.5 JanFebruary: 1.57 in precipitation 1.6 FebMarch: 3.11 in precipitation 3.1 MarApril: 3.81 in precipitation 3.8 AprMay: 5.11 in precipitation 5.1 MayJune: 4.91 in precipitation 4.9 JunJuly: 3.42 in precipitation 3.4 JulAugust: 3.41 in precipitation 3.4 AugSeptember: 3.69 in precipitation 3.7 SepOctober: 3.68 in precipitation 3.7 OctNovember: 2.22 in precipitation 2.2 NovDecember: 2.11 in precipitation 2.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Meeker 5 W, OK (9 mi away); precipitation: Meeker 9.1 Nw, OK (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

748517b
Mcloud, OK · 7 mi
730207b
Choctaw, OK · 8 mi
730497b
Jones, OK · 10 mi
730667b
Nicoma Park, OK · 11 mi
730847b
Spencer, OK · 12 mi
730547b
Luther, OK · 12 mi
731307b
Oklahoma City, OK · 12 mi
748577b
Newalla, OK · 12 mi

Oklahoma planting zones →

Questions about 73045

What planting zone is ZIP code 73045?

ZIP code 73045 (Harrah, OK) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Harrah, OK?

The median last spring frost (32 °F) near 73045 is April 4; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Meeker 5 W station.

When is the first frost in Harrah, OK?

The median first fall frost near 73045 is October 30, giving a median frost-free growing season of 208 days.

When should I plant tomatoes in 73045?

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 73045 get?

About 38.5 inches of precipitation a year (NOAA 1991–2020 normals, Meeker 9.1 Nw station).

How hot do summers get in Harrah, OK?

The average high peaks at 92 °F in July, with about 59 days a year at 90 °F or more.

What kind of soil does 73045 have?

The USDA soil survey maps Harrah at the center of ZIP 73045: fine sandy loam, well drained, pH about 5.9 (moderately acidic).

Did spring come early in Harrah, OK in 2026?

Spring leaf-out near 73045 came on Feb 12 in 2026, 10 days earlier than the 1991–2020 average (Feb 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Harrah, OK?

Intermediate onions: the longest day near 73045 is 14 h 34 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 73045 change?

Yes. The 2012 USDA map put 73045 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.