dont know about the palm, but the others are fully hardy and will be fine outside even if there is a frost.

however where have they been in the last week? if they have been indoors then i would put them out in the day and in for the night for a week then they can stay out all year.

The Canary Island Date Palm is quite hardy to about -8 or even lower for short spells, so as long as you bring it in when there's a forcast of severe frost there shouldn't be a problem if it's in a pot and easy to move. I think that larger, more mature trees would be a bit more frost hardy.