It’s supposed to be cold the next couple of nights so depending on what part of the city you’re in or how sheltered your tree is, your apples might get some frost damage.
A light frost or two is fine for apples (some people say they taste better after a frost!). But a few nights in a row at -5°C ish can cause damage like in this picture. The apples get a watery soft layer under the skin.
Once you see those signs of damage, they are no longer good for pressing into cider and the texture will be bad for eating or cooking – except pigs and other animals will still love them! Check with your farmer friends if they want them.