Planting zone for 94062 — Redwood City, CA
ZIP code 94062 (Redwood City, San Mateo County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F. The median last spring frost is February 25 and the first fall frost November 25.
Where ZIP 94062 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 Redwood City, 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 Redwood City, CA
A hard freeze (28 °F) usually ends around January 13 and returns around December 12.
From the NOAA station Woodside Fire Stn 1, CA — 2 miles away, elevation 381 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 94062
Counted from the median last spring frost (Feb 25) and first fall frost (Nov 25) 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 94062 came on Jan 20 — 9 days earlier than the 1991–2020 average (Jan 29).
Jan 292026
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 Redwood City, CA
The soil mapped at the center of ZIP 94062 is Alambique — gravelly loam, well drained.
Map unit: Alambique-McGarvey complex, 30 to 75 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 94062; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Redwood City, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Woodside Fire Stn 1, CA (2 mi away); precipitation: Woodside 3.4 S, CA (4 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.
All 5 ZIP codes in Redwood City → · California planting zones →
Questions about 94062
What planting zone is ZIP code 94062?
ZIP code 94062 (Redwood City, 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 Redwood City, CA?
The median last spring frost (32 °F) near 94062 is February 25; after April 11 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Woodside Fire Stn 1 station.
When is the first frost in Redwood City, CA?
The median first fall frost near 94062 is November 25, giving a median frost-free growing season of 274 days.
When should I plant tomatoes in 94062?
Start tomato seeds indoors around Dec 31 – Jan 14 and set transplants outside around Mar 4 – Mar 18, one to three weeks after the median last frost.
How much rain and snow does 94062 get?
About 43.6 inches of precipitation a year (NOAA 1991–2020 normals, Woodside 3.4 S station).
How hot do summers get in Redwood City, CA?
The average high peaks at 89 °F in August, with about 55 days a year at 90 °F or more.
What kind of soil does 94062 have?
The USDA soil survey maps Alambique at the center of ZIP 94062: gravelly loam, well drained, pH about 5.6 (moderately acidic).
Did spring come early in Redwood City, CA in 2026?
Spring leaf-out near 94062 came on Jan 20 in 2026, 9 days earlier than the 1991–2020 average (Jan 29), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Redwood City, CA?
Intermediate onions: the longest day near 94062 is 14 h 45 min, so day-neutral types bulb best; long-day varieties may not bulb fully.
Did the zone for 94062 change?
Yes. The 2012 USDA map put 94062 in zone 9b; the 2023 map puts it in zone 10a. The newer map uses 1991–2020 data and more weather stations.