Planting zone for 93434 — Guadalupe, CA
ZIP code 93434 (Guadalupe, Santa Barbara County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F. The median last spring frost is February 4 and the first fall frost December 13.
Where ZIP 93434 is
Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoomNot 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.
Was 9b 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 10a means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Guadalupe, CA…
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 Guadalupe, CA
A hard freeze (28 °F) usually ends around January 5 and returns around December 27.
From the NOAA station Santa Maria Public Airport, CA — 10 miles away, elevation 243 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 93434
Counted from the median last spring frost (Feb 4) and first fall frost (Dec 13) 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 93434 came on Jan 20 — 4 days earlier than the 1991–2020 average (Jan 24).
Jan 242026
Jan 20
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 Guadalupe, CA
The soil mapped at the center of ZIP 93434 is Oceano — sand, somewhat excessively drained.
Map unit: Oceano sand, 2 to 15 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 93434; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Guadalupe, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Santa Maria Public Airport, CA (10 mi away); precipitation: Santa Maria Public Airport, CA (10 mi away). Daylight is calculated from latitude.
Nearby ZIP codes
5 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.
Questions about 93434
What planting zone is ZIP code 93434?
ZIP code 93434 (Guadalupe, CA) is in USDA hardiness zone 10a on the 2023 map: the coldest night of an average winter reaches 30 to 35 °F (−1.1 to 1.7 °C).
When is the last frost in Guadalupe, CA?
The median last spring frost (32 °F) near 93434 is February 4; after March 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Santa Maria Public Airport station.
When is the first frost in Guadalupe, CA?
The median first fall frost near 93434 is December 13, giving a median frost-free growing season of 315 days.
When should I plant tomatoes in 93434?
Start tomato seeds indoors around Dec 10 – Dec 24 and set transplants outside around Feb 11 – Feb 25, one to three weeks after the median last frost.
How much rain and snow does 93434 get?
About 13.3 inches of precipitation a year (NOAA 1991–2020 normals, Santa Maria Public Airport station).
How hot do summers get in Guadalupe, CA?
The average high peaks at 75 °F in September, with about 6 days a year at 90 °F or more.
What kind of soil does 93434 have?
The USDA soil survey maps Oceano at the center of ZIP 93434: sand, somewhat excessively drained, pH about 4.5 (strongly acidic).
Did spring come early in Guadalupe, CA in 2026?
Spring leaf-out near 93434 came on Jan 20 in 2026, 4 days earlier than the 1991–2020 average (Jan 24), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Guadalupe, CA?
Intermediate onions: the longest day near 93434 is 14 h 30 min, so day-neutral types bulb best; long-day varieties may not bulb fully.
Did the zone for 93434 change?
Yes. The 2012 USDA map put 93434 in zone 9b; the 2023 map puts it in zone 10a. The newer map uses 1991–2020 data and more weather stations.