Upland, CA planting zone & frost dates
Upland 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
Useful for zone 10a gardens
- Drip irrigation kit — saves water in long, hot seasons
- Shade cloth — protects plants from midday sun
- Soil moisture meter
- Plants for zone 10
As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.
Hardiness zone by ZIP code in Upland
- 91784 zone 10a
- 91785 zone 10a
- 91786 zone 10a
Nearby cities
- Ontario zone 10a
- Montclair zone 10a, last frost Jan 8
- Rancho Cucamonga zone 10a
- Claremont zone 10a, last frost Jan 8
- Chino zone 10a, last frost Jan 17
- Pomona zone 10a, last frost Jan 8
- La Verne zone 10a, last frost Jan 8
- Chino Hills zone 10a, last frost Jan 8
Questions
What growing zone is Upland, CA?
Upland 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 Ontario Intl Ap, CA (USW00003102), 6.4 km (4.0 mi) from the city center, elevation 289 m, based on 14 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.