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

Planting zone for 94037 — Montara, CA

ZIP code 94037 (Montara, San Mateo County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F.

Where ZIP 94037 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.

Zone10a30 to 35 °F
Coldest night−1.1 to 1.7 °C
Last frostrare
First frostrare
2012 zone10a

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 Service

Loading the forecast for Montara, 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 Pacifica 4 Sse, CA — 3 miles away, elevation 476 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 94037 came on Jan 20 — 6 days earlier than the 1991–2020 average (Jan 26).

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 Montara, CA

The soil mapped at the center of ZIP 94037 is Scarper — gravelly coarse sandy loam, well drained.

TextureGravelly coarse sandy loamdrains and warms fast; dries out and needs more feeding
pH6.1slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2%moderate
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Scarper-Miramar 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 94037; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Montara, CA

Summer high72 °Faverage high, September
Winter low45 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights1nights a year at 32 °F or less
Growing degree days2,794base 50 °F — the season’s usable heat
Longest day14 h 46 mindaylight on June 21
Shortest day9 h 34 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation31.9 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°32 °FJanuary: average high 58 °F, low 45 °F 58°45° JanFebruary: average high 60 °F, low 46 °F 60°46° FebMarch: average high 61 °F, low 46 °F 61°46° MarApril: average high 64 °F, low 48 °F 64°48° AprMay: average high 67 °F, low 49 °F 67°49° MayJune: average high 69 °F, low 51 °F 69°51° JunJuly: average high 69 °F, low 52 °F 69°52° JulAugust: average high 71 °F, low 53 °F 71°53° AugSeptember: average high 72 °F, low 53 °F 72°53° SepOctober: average high 70 °F, low 52 °F 70°52° OctNovember: average high 64 °F, low 50 °F 64°50° NovDecember: average high 59 °F, low 46 °F 59°46° Dec

Precipitation by month inches

0″2″4″6″January: 6.14 in precipitation 6.1 JanFebruary: 6.48 in precipitation 6.5 FebMarch: 4.45 in precipitation 4.5 MarApril: 2.36 in precipitation 2.4 AprMay: 1.00 in precipitation 1.0 MayJune: 0.25 in precipitation 0.3 JunJuly: 0.01 in precipitation 0.0 JulAugust: 0.08 in precipitation 0.1 AugSeptember: 0.11 in precipitation 0.1 SepOctober: 1.50 in precipitation 1.5 OctNovember: 2.86 in precipitation 2.9 NovDecember: 6.64 in precipitation 6.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Pacifica 4 Sse, CA (3 mi away); precipitation: Pacifica 4 Sse, CA (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 10a.

9403810a
Moss Beach, CA · 2 mi
9401810a
El Granada, CA · 3 mi
9404410a
Pacifica, CA · 4 mi
9403010a
Millbrae, CA · 6 mi
9406610a
San Bruno, CA · 6 mi
9401010a
Burlingame, CA · 7 mi
9401110a
Burlingame, CA · 7 mi
9412810a
San Francisco, CA · 8 mi

California planting zones →

Questions about 94037

What planting zone is ZIP code 94037?

ZIP code 94037 (Montara, 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 94037 get?

About 31.9 inches of precipitation a year (NOAA 1991–2020 normals, Pacifica 4 Sse station).

How hot do summers get in Montara, CA?

The average high peaks at 72 °F in September, with about 2 days a year at 90 °F or more.

What kind of soil does 94037 have?

The USDA soil survey maps Scarper at the center of ZIP 94037: gravelly coarse sandy loam, well drained, pH about 6.1 (slightly acidic).

Did spring come early in Montara, CA in 2026?

Spring leaf-out near 94037 came on Jan 20 in 2026, 6 days earlier than the 1991–2020 average (Jan 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Montara, CA?

Intermediate onions: the longest day near 94037 is 14 h 46 min, so day-neutral types bulb best; long-day varieties may not bulb fully.