Why did you put it outside if you're aware of its needs? Yes, it's too cold, and it's too wet even for a Fukien. Throw away that moss - it's helping hold in all the rain, plus I can bet that the soil mix it came in is mostly soggy water holding peat ("potting soil") vs the 50-60% fast draining grit (plus 40% organics) it should be in. Get it inside into very high light (a full spectrum high wattage fluorescent 6 inches above it for 15 hours a day, if possible) and let it start to dry out (at least the top 3/4"). In the meantime pick up some small size gravel for aquariums and a bag of Orchid mix. Break the soft wood in that bag into smaller (1/8") pieces, add them and some of the soil in the bag to the grit so that the grit becomes 60% of it and the O. mix the rest and mix it all up. Then repot, cutting back any roots that are slimy black and/or stinky to clean places. Make sure the new mix is fed in around all the roots leaving no gaps. Then water once and do not leave the pot sitting in the drain water. From then on water when the top half inch is dry - around every two days, but you judge - and give it a few weeks to see if new growth occurs. Seattle rain can be drained off a large tree in the ground, but there are limits to a tiny tree in a tiny pot! When the weather stays above 65 F. let it stay out but with some kind of protection from anything more than a light passing shower (and adjust watering accordingly). When it's living inside, put the pot up on large pebbles in a wide tray of stones and water - the idea is to humidify 24/7 without rotting roots in standing water.

Thank you. Will do.