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

Planting zone for 73625 — Butler, OK

ZIP code 73625 (Butler, Custer County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 9 and the first fall frost October 28.

Where ZIP 73625 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 9
First frostOct 28
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 Butler, 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 Butler, OK

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 9median — 50% chance of a later frost
Safe for tender plantsApril 24only 10% chance of frost after
First fall frostOctober 28median — 10% chance by Oct 14
Growing season199 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 31 and returns around November 4.

From the NOAA station Butler 5sw Mesonet, OK — 8 miles away, elevation 1,706 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 73625

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 26 – Mar 12
SpinachSow outdoors · Feb 26 – Mar 19
Broccoli, cabbageStart indoors · Jan 29 – Feb 12
Broccoli, cabbageTransplant · Mar 19 – Apr 2
Onion setsPlant outdoors · Mar 12 – Mar 26
PotatoesPlant outdoors · Mar 19 – Apr 2
LettuceSow outdoors · Mar 12 – Mar 26
Carrots, beetsSow outdoors · Mar 19 – Apr 2
TomatoesStart indoors · Feb 12 – Feb 26
TomatoesTransplant · Apr 16 – Apr 30
Peppers, eggplantStart indoors · Jan 29 – Feb 12
Peppers, eggplantTransplant · Apr 23 – May 7
BeansSow outdoors · Apr 16 – Apr 30
Sweet cornSow outdoors · Apr 16 – Apr 30
Cucumbers, squashSow outdoors · Apr 16 – Apr 30
Fall lettuce, spinachSow outdoors · Sep 2 – Sep 16
GarlicPlant cloves · Oct 14 – Nov 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 9) and first fall frost (Oct 28) 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 73625 came on Feb 12 — 15 days earlier than the 1991–2020 average (Feb 27).

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 Butler, OK

The soil mapped at the center of ZIP 73625 is Quinlan — loam, well drained.

TextureLoama good balance for most vegetables
pH7.9alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Quinlan-Woodward complex, 5 to 12 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 73625; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Butler, OK

Summer high95 °Faverage high, July
Winter low23 °Faverage low, January
Hot days93days a year at 90 °F or more
Freezing nights101nights a year at 32 °F or less
Growing degree days4,996base 50 °F — the season’s usable heat
Longest day14 h 35 mindaylight on June 21
Shortest day9 h 44 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation27.6 inper year, rain and melted snow
Snowfall7 inper year

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 51 °F, low 23 °F 51°23° JanFebruary: average high 55 °F, low 28 °F 55°28° FebMarch: average high 65 °F, low 36 °F 65°36° MarApril: average high 73 °F, low 46 °F 73°46° AprMay: average high 82 °F, low 56 °F 82°56° MayJune: average high 89 °F, low 66 °F 89°66° JunJuly: average high 95 °F, low 69 °F 95°69° JulAugust: average high 94 °F, low 69 °F 94°69° AugSeptember: average high 86 °F, low 60 °F 86°60° SepOctober: average high 75 °F, low 47 °F 75°47° OctNovember: average high 62 °F, low 34 °F 62°34° NovDecember: average high 51 °F, low 26 °F 51°26° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″January: 0.92 in precipitation, 1.8 in snowfall 0.9❄2 JanFebruary: 0.82 in precipitation, 1.2 in snowfall 0.8❄1 FebMarch: 2.03 in precipitation, 1.8 in snowfall 2.0❄2 MarApril: 2.62 in precipitation 2.6 AprMay: 3.89 in precipitation 3.9 MayJune: 3.49 in precipitation 3.5 JunJuly: 2.23 in precipitation 2.2 JulAugust: 2.94 in precipitation 2.9 AugSeptember: 2.94 in precipitation 2.9 SepOctober: 2.65 in precipitation 2.6 OctNovember: 1.53 in precipitation 1.5 NovDecember: 1.54 in precipitation, 2.3 in snowfall 1.5❄2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Butler 5sw Mesonet, OK (8 mi away); precipitation: Hammon 3 Ssw, OK (14 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

4 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

736207b
Arapaho, OK · 10 mi
736397b
Custer City, OK · 13 mi
736507a
Hammon, OK · 13 mi
736547a
Leedey, OK · 15 mi
736477b
Foss, OK · 18 mi
736267b
Canute, OK · 18 mi
736597a
Putnam, OK · 19 mi
738357a
Camargo, OK · 19 mi

Oklahoma planting zones →

Questions about 73625

What planting zone is ZIP code 73625?

ZIP code 73625 (Butler, 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 Butler, OK?

The median last spring frost (32 °F) near 73625 is April 9; after April 24 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Butler 5sw Mesonet station.

When is the first frost in Butler, OK?

The median first fall frost near 73625 is October 28, giving a median frost-free growing season of 199 days.

When should I plant tomatoes in 73625?

Start tomato seeds indoors around Feb 12 – Feb 26 and set transplants outside around Apr 16 – Apr 30, one to three weeks after the median last frost.

How much rain and snow does 73625 get?

About 27.6 inches of precipitation a year and 7 inches of snowfall (NOAA 1991–2020 normals, Hammon 3 Ssw station).

How hot do summers get in Butler, OK?

The average high peaks at 95 °F in July, with about 93 days a year at 90 °F or more.

What kind of soil does 73625 have?

The USDA soil survey maps Quinlan at the center of ZIP 73625: loam, well drained, pH about 7.9 (alkaline).

Did spring come early in Butler, OK in 2026?

Spring leaf-out near 73625 came on Feb 12 in 2026, 15 days earlier than the 1991–2020 average (Feb 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Butler, OK?

Intermediate onions: the longest day near 73625 is 14 h 35 min, so day-neutral types bulb best; long-day varieties may not bulb fully.