There are also some trailing Crassulas and Sedums that could work well.
Crassula 'Springtime'
Watch Chain Plant (Crassula muscosa)
Calico Kitten (Crassula pellucida subsp. marginalis 'Variegata')
Buttons on a String (Crassula rupestris)
Stringy Stonecrop (Sedum sarmentosum)
Creeping Callisias:
Inch Plant (Callisia cordifolia)
Basket Plant (Callisia fragrans)
Striped Inch Plant (Callisia gentlei var. elegans)
Inch Plant (Callisia repens)
Gibasis geniculata (Tahitian bridal veil.)
Tahitian Bridal Veil (Gibasis geniculata)
Tradescantia sillamontana, cerinthoides, zebrina, and pallida are quite succulent, and hang well.
Inch Plant (Tradescantia cerinthoides)
Purple Heart (Tradescantia pallida)
White Velvet (Tradescantia sillamontana)
Inch Plant (Tradescantia zebrina)
Kalanchoe fedtschenkoi is an upright grower, until the stems get about 18" tall, then they start to lean over. I keep cutting mine off but they would probably make a very interesting/pretty hanging basket if left alone to lean and dangle over the edges.
Lavender Scallops (Kalanchoe fedtschenkoi)
Hopefully someone who has had these in a climate with dry air like yours could confirm. I've only had them in very humid Alabama, so have no basis for comparison to know if these plants like or hate humidity, or if mine are doing comparatively well, or struggling, because of the oppressive humidity here.
Other Senecios also come to mind, like string-of-pearls and -bananas.
String of Bananas (Curio radicans)
Regardless of plant type, and aside from weather and sun exposure, the amount of roots per soil will be the biggest factor in how often plants dry. If plants are drying too quickly, try repotting and/or separating into 2 pots, or moving to a slightly more shady spot, especially during the heat of mid-day.
