The following are minimum temperatures at which the plants have survived with more or less visible damage (burnt leaves and/or cold spots).As you know, cold-damage results from a combination of low temperatures,their duration and humidity.This data serves only as a guideline and if possible :
Don't come close to these figures !
Archontophoenix alexandrae - 28°F
Archontophoenix cunninghamia - 25°F
Archontophoenix purpurea - 27°F
Arenga engleri - 21°F
Arenga pinnata - 30°F
Arenga tremula - 28°F
Bismarkia noblis - 25°F
Brahea armata - 15°F
Brahea dulcis - 25°F
Brahea edulis - 19°F
Butia capitata - 14°F
Carpentaria acuminata - 32°F
Caryota urens - 25°F
Chamaedorea elegans - 26°F
Chamaedorea glaucifolia - 28°F
Chamaedorea microspadix - 21°F
Chamaedorea radicalis - 20°F
Chamaedorea seifrizii - 28°F
Chamaedorea tepejilote - 27°F
Chamaerops humilis - 12°F
Chambeyronia macrocarpa - 28°F
Coccothrinax miraguama - 27°F
Dictyosperma album - 29°F
Dypsis baronii - 27°F
Dypsis cabadae - 31°F
Dypsis decaryi - 28°F
Dypsis decipiens- 23°F
Dypsis lastelliana- 30°F
Dypsis leptochielos - 29°F
Dypsis lutescens - 25°F
Dypsis madagascariensis - 29°F
Dypsis onilahensis - 25°F
Howea forsteriana - 26°F
Jubaea chilensis - 10°F
Laccospadix australasica - 26°F
Latania loddigesii - 32°F
Licuala spinosa - 28°F
Livistona autstralis - 22°F
Livistona chinensis - 21°F
Livistona decipiens - 25°F
Livistona robinsoniana - 29°F
Livistona saribus - 25°F
Nannorrhops ritchiana - 10°F
Normanbya normanbyi - 27°F
Phoenix canariensis - 20°F
Phoenix dactylifera - 16°F
Phoenix reclinata - 20°F
Phoenix roebelenii - 27°F
Prestoea acuminata - 30°F
Ptychosperma caryotoides - 30°F
Ptychosperma elegans - 28°F
Ptychosperma macarthurii - 31°F
Ptychosperma robustium - 30°F
Ravenea glauca - 26°F
Ravenea madagascariensis - 25°F
Ravenea rivularis - 26°F
Rhapis excelsa - 22°F
Rhapis humilis - 25°F
Rhopalostylis baueri - 28°F
Rhopalostylis sapida - 28°F
Roystonea borinquena - 29°F
Roystonea oleracea - 30°F
Roystonea regia - 28°F
Sabal causiarum - 20°F
Sabal mexicana - 25°F
Sabal minor - 21°F
Sabal palmetto - 23°F
Sabal "Riverside" - 15°F
Syagrus romanzoffianum - 21°F
Thrinax radiata - 27°F
Trachycarpus fortunei - 11°F
Trachycarpus takil - 8°F
Trithrinax acanthocoma - 18°F
Trithrinax braziliensis - 18°F
Veitchia arecina - 29°F
Veitchia joannis - 29°F
Veitchia macdanielsii - 30°F
Veitchia merrillii - 32°F
Washingtonia filifera - 12°F
Washingtonia robusta - 18°F
Wodyetia bifurcata - 26°F
Cycads
Bowenia serrulata - 29°F
Bowenia spectabilis - 27°F
Ceratozamia hildae - 30°F
Ceratozamia kuesteriana - 28°F
Ceratozamia mexicana - 27°F
Ceratozamia norstogii - 27°F
Ceratozamia robusta - 26°F
Cycas circinalis - 25°F
Cycas megacarpa - 25°F
Cycas panzhihuaensis - 18°F
Cycas pectinata - 27°F
Cycas revoluta - 19°F
Cycas rumphii - 30°F
Cycas taitungensis - 23°F
Cycas taiwaniana - 25°F
Cycas tansachana - 26°F
Cycas thouarsii - 27°F
Dioon edule - 19°F
Dioon mejiae - 28°F
Dioon merolae - 27°F
Dioon spinulosum - 26°F
Encephalartos altensteinii - 25°F
Encephalartos aemulans - 24°F
Encephalartos arenarius - 25°F
Encephalartos caffer - 29°F
Encephalartos ferox - 26°F
Encephalartos gratus - 28°F
Encephalartos horridus - 23°F
Encephalartos lebomboensis - 27°F
Encephalartos lehmanii - 21°F
Encephalartos longifolius - 27°F
Encephalartos manikensis - 27°F
Encephalartos natalensis - 24°F
Encephalartos princeps - 20°F
Encephalartos trispinosus - 24°F
Encephalartos villosus - 27°F
Lepidozamia hopei - 27°F
Lepidozamia peroffskyana - 25°F
Macrozamia communis - 22°F
Macrozamia diplomera - 25°F
Macrozamia johnsonii - 28°F
Macrozamia moorei - 23°F
Macrozamia riedlii - 21°F
Zamia floridiana - 24°F
Zamia furfuracea / maritima - 28°F
Zamia integrifolia - 24°F