Millbrae, CA planting zone & frost dates
Millbrae is in USDA hardiness zone 10a. Frost is rare here: in most years temperatures do not drop to 32°F.
USDA hardiness zone10aavg. extreme winter low 30°F to 35°F
FrostRarein most years the nearest weather station records no 32°F freeze
Hardiness zone by ZIP code in Millbrae
- 94030 zone 10a
Nearby cities
- Burlingame zone 10a
- Hillsborough zone 10a
- San Bruno zone 10a
- South San Francisco zone 10b
- San Mateo zone 10a
- Pacifica zone 10a
- Foster City zone 10a, last frost Jan 17
- Bayview-Hunters Point zone 10b
Questions
What growing zone is Millbrae, CA?
Millbrae is in USDA Plant Hardiness Zone 10a (average extreme winter low 30°F to 35°F), according to the USDA 2023 map.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station San Francisco Intl Ap, CA (USW00023234), 3.1 km (1.9 mi) from the city center, elevation 2 m, based on 26 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.