Planting zone for 94966 — Sausalito, CA
ZIP code 94966 (Sausalito, Marin County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F.
Where ZIP 94966 is
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.
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 10a means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Sausalito, 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
A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Richmond, CA — 7 miles away, elevation 20 ft) the median growing season is 365 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 94966 came on Jan 24 — 3 days earlier than the 1991–2020 average (Jan 27).
Jan 272026
Jan 24
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 Sausalito, CA
The center of ZIP 94966 is mapped as Urban land-Xerorthents complex, 0 to 9 percent slopes: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.
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 94966; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Sausalito, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: San Francisco Dwtn, CA (7 mi away); precipitation: Muir Woods, CA (6 mi away). Daylight is calculated from latitude.
Nearby ZIP codes
3 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.
All 2 ZIP codes in Sausalito → · California planting zones →
Questions about 94966
What planting zone is ZIP code 94966?
ZIP code 94966 (Sausalito, 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).
How much rain and snow does 94966 get?
About 36.2 inches of precipitation a year (NOAA 1991–2020 normals, Muir Woods station).
How hot do summers get in Sausalito, CA?
The average high peaks at 70 °F in September, with about 3 days a year at 90 °F or more.
Did spring come early in Sausalito, CA in 2026?
Spring leaf-out near 94966 came on Jan 24 in 2026, 3 days earlier than the 1991–2020 average (Jan 27), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Sausalito, CA?
Intermediate onions: the longest day near 94966 is 14 h 47 min, so day-neutral types bulb best; long-day varieties may not bulb fully.