Monrovia, CA planting zone & frost dates
Monrovia 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 Monrovia
- 91016 zone 10a
- 91017 zone 10a
Nearby cities
- Duarte zone 10a
- Arcadia zone 10a
- Sierra Madre zone 10a
- Temple City zone 10a
- Baldwin Park zone 10a
- El Monte zone 10b
- Azusa zone 10a, last frost Jan 8
- West Covina zone 10a
Questions
What growing zone is Monrovia, CA?
Monrovia 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 Gabriel Fire Dept, CA (USC00047785), 11.7 km (7.3 mi) from the city center, elevation 111 m, based on 18 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.