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

Planting zone for 73036 — El Reno, OK

ZIP code 73036 (El Reno, Canadian County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 6 and the first fall frost October 31.

Where ZIP 73036 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 6
First frostOct 31
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 El Reno, 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 El Reno, OK

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 22only 10% chance of frost after
First fall frostOctober 31median — 10% chance by Oct 15
Growing season206 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 26 and returns around November 7.

From the NOAA station El Reno 1 N, OK — 3 miles away, elevation 1,326 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 73036

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 5 – Sep 19
GarlicPlant cloves · Oct 17 – Nov 21
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 6) and first fall frost (Oct 31) 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 73036 came on Feb 12 — 12 days earlier than the 1991–2020 average (Feb 24).

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 El Reno, OK

The soil mapped at the center of ZIP 73036 is Norge — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.6moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Norge silt loam, 5 to 8 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 73036; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in El Reno, OK

Summer high94 °Faverage high, July
Winter low25 °Faverage low, January
Hot days75days a year at 90 °F or more
Freezing nights76nights a year at 32 °F or less
Growing degree days4,796base 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
Precipitation34.5 inper year, rain and melted snow
Snowfall4 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 49 °F, low 25 °F 49°25° JanFebruary: average high 53 °F, low 28 °F 53°28° FebMarch: average high 62 °F, low 36 °F 62°36° MarApril: average high 71 °F, low 46 °F 71°46° AprMay: average high 79 °F, low 57 °F 79°57° MayJune: average high 88 °F, low 66 °F 88°66° JunJuly: average high 94 °F, low 70 °F 94°70° JulAugust: average high 92 °F, low 68 °F 92°68° AugSeptember: average high 84 °F, low 60 °F 84°60° SepOctober: average high 73 °F, low 48 °F 73°48° OctNovember: average high 60 °F, low 36 °F 60°36° NovDecember: average high 50 °F, low 28 °F 50°28° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 0.93 in precipitation, 1.8 in snowfall 0.9❄2 JanFebruary: 1.17 in precipitation, 0.4 in snowfall 1.2 FebMarch: 2.43 in precipitation 2.4 MarApril: 3.06 in precipitation 3.1 AprMay: 5.16 in precipitation 5.2 MayJune: 5.61 in precipitation 5.6 JunJuly: 3.23 in precipitation 3.2 JulAugust: 3.30 in precipitation 3.3 AugSeptember: 3.03 in precipitation 3.0 SepOctober: 3.00 in precipitation 3.0 OctNovember: 2.13 in precipitation, 0.3 in snowfall 2.1 NovDecember: 1.49 in precipitation, 1.1 in snowfall 1.5❄1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: El Reno 1 N, OK (3 mi away); precipitation: El Reno 1 N, OK (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

730907b
Union City, OK · 8 mi
730227b
Concho, OK · 8 mi
730997b
Yukon, OK · 11 mi
730857b
Yukon, OK · 12 mi
730147b
Calumet, OK · 12 mi
730597b
Minco, OK · 13 mi
737627b
Okarche, OK · 14 mi
730647b
Mustang, OK · 15 mi

Oklahoma planting zones →

Questions about 73036

What planting zone is ZIP code 73036?

ZIP code 73036 (El Reno, 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 El Reno, OK?

The median last spring frost (32 °F) near 73036 is April 6; after April 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, El Reno 1 N station.

When is the first frost in El Reno, OK?

The median first fall frost near 73036 is October 31, giving a median frost-free growing season of 206 days.

When should I plant tomatoes in 73036?

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 73036 get?

About 34.5 inches of precipitation a year and 4 inches of snowfall (NOAA 1991–2020 normals, El Reno 1 N station).

How hot do summers get in El Reno, OK?

The average high peaks at 94 °F in July, with about 75 days a year at 90 °F or more.

What kind of soil does 73036 have?

The USDA soil survey maps Norge at the center of ZIP 73036: silt loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in El Reno, OK in 2026?

Spring leaf-out near 73036 came on Feb 12 in 2026, 12 days earlier than the 1991–2020 average (Feb 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in El Reno, OK?

Intermediate onions: the longest day near 73036 is 14 h 34 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 73036 change?

Yes. The 2012 USDA map put 73036 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.