Here are a few orchids for you to consider...
Coelogyne cristata
Cuitlauzina pendula
Dendrobium falcorostrum
Dendrobium gracilicaule
Dendrobium kingianum
Dendrobium moniliforme
Dendrobium nobile
Dendrobium speciosum
Dendrobium striolatum
Encyclia mariae
Epidendrum parkinsonianum
Holcoglossum flavescens
Laelia albida
Laelia anceps
Laelia furfuracea
Laelia gouldiana
Lycaste aromatica
Neofinetia falcata
Oncidium flexuosum
Pholidota recurva
Sedirea japonica
Sophronitis cernua
Vanda coerulea
Vanda cristata
It's by no means a comprehensive list and it can definitely be expanded if you can provide your orchids with some shelter or if you are interested in terrestrial orchids. Over head shelter... either a thick canopy of leaves, shade cloth, etc can help prevent cold air from settling on the orchids. My orchids are in a tall shade shelter that's in the open with 50% shade cloth over head and trellis for the walls. The wind really whips through there and beats up the orchids. I've visited other outdoor growers in the area and have noticed that people's orchids tend to do better if they are in relatively narrow walk way between one wall of the house and a wall of the property with shade cloth over head.
To check and see which of your orchids or future orchids might do well outdoors I recommend spending $1 to purchase the culture sheet from the
orchid culture website. It's also helpful to ask the members of your local orchid society which of their orchids they grow outdoors year around. Although, in my experience it seems most growers prefer to err on the side of over cautious when it comes to temperature tolerance.