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

Planting zone for 33574 — Saint Leo, FL

ZIP code 33574 (Saint Leo, Pasco County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 33574 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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostrare
First frostrare
2012 zone9b

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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Saint Leo, FL…

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

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Saint Leo, FL — within 1 mile, elevation 190 ft) the median growing season is 336 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 33574 came on Jan 12 — 5 days earlier than the 1991–2020 average (Jan 17).

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 Saint Leo, FL

The soil mapped at the center of ZIP 33574 is Matlacha — gravelly fine sand, somewhat poorly drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureGravelly fine sanddrains and warms fast; dries out and needs more feeding
pH7.0neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter1%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Urban land, 0 to 2 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 33574; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Saint Leo, FL

Summer high90 °Faverage high, July
Winter low49 °Faverage low, January
Hot days114days a year at 90 °F or more
Freezing nights3nights a year at 32 °F or less
Growing degree days8,044base 50 °F — the season’s usable heat
Longest day13 h 57 mindaylight on June 21
Shortest day10 h 20 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation53.5 inper year, rain and melted snow

Average high and low, by month

40°50°60°70°80°90°100°January: average high 70 °F, low 49 °F 70°49° JanFebruary: average high 73 °F, low 52 °F 73°52° FebMarch: average high 78 °F, low 55 °F 78°55° MarApril: average high 83 °F, low 60 °F 83°60° AprMay: average high 88 °F, low 66 °F 88°66° MayJune: average high 89 °F, low 71 °F 89°71° JunJuly: average high 90 °F, low 73 °F 90°73° JulAugust: average high 90 °F, low 73 °F 90°73° AugSeptember: average high 88 °F, low 71 °F 88°71° SepOctober: average high 83 °F, low 65 °F 83°65° OctNovember: average high 77 °F, low 57 °F 77°57° NovDecember: average high 72 °F, low 52 °F 72°52° Dec

Precipitation by month inches

0″2″4″6″8″January: 3.06 in precipitation 3.1 JanFebruary: 2.38 in precipitation 2.4 FebMarch: 3.18 in precipitation 3.2 MarApril: 3.06 in precipitation 3.1 AprMay: 2.98 in precipitation 3.0 MayJune: 8.34 in precipitation 8.3 JunJuly: 8.10 in precipitation 8.1 JulAugust: 8.28 in precipitation 8.3 AugSeptember: 6.63 in precipitation 6.6 SepOctober: 3.06 in precipitation 3.1 OctNovember: 1.86 in precipitation 1.9 NovDecember: 2.53 in precipitation 2.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Saint Leo, FL (within 1 mile); precipitation: Saint Leo, FL (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

335269b
Dade City, FL · 2 mi
335769b
San Antonio, FL · 4 mi
335259b
Dade City, FL · 5 mi
335459b
Wesley Chapel, FL · 5 mi
335239b
Dade City, FL · 6 mi
335419b
Zephyrhills, FL · 8 mi
335429b
Zephyrhills, FL · 9 mi
335409b
Zephyrhills, FL · 9 mi

Florida planting zones →

Questions about 33574

What planting zone is ZIP code 33574?

ZIP code 33574 (Saint Leo, FL) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

How much rain and snow does 33574 get?

About 53.5 inches of precipitation a year (NOAA 1991–2020 normals, Saint Leo station).

How hot do summers get in Saint Leo, FL?

The average high peaks at 90 °F in July, with about 114 days a year at 90 °F or more.

What kind of soil does 33574 have?

The USDA soil survey maps Matlacha at the center of ZIP 33574: gravelly fine sand, somewhat poorly drained, pH about 7.0 (neutral).

Did spring come early in Saint Leo, FL in 2026?

Spring leaf-out near 33574 came on Jan 12 in 2026, 5 days earlier than the 1991–2020 average (Jan 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Saint Leo, FL?

Short-day onions: the longest day near 33574 is 13 h 57 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.