Honestly, I watered all my sans a few times through the winter because they needed it. If you feel that it looks thirsty, I'd give it a drink :)

Everything is connected under the soil. When you water, saturate all of the soil, then let everything dry out. Sans are not cactus, water when dry. If the pot is not on the floor, it should stay warm enough.

But I did see they've got the plant in the Window, so it might feel some cold there. I didn't answer 'cause I didn't know how to address that.

Temps here today are in the 20s, supposedly single digit wind chill. Even tho' I've got plenty of heat on, I can still feel the cold coming off the windows.

My window succulents that I've been watering recently have warm radiators underneath them. My Sans aren't near the Windows so it's not an issue for them.

Consider adding water to your saucer from below and letting it spread upward. You might want to add water to the saucer several times.

I'm in south Florida. All of my Sans are outside in a patio with a screen enclosure. Just this past week I began watering again for the same reason stated above, pups are popping up. I won't began frequent watering, however for a few more weeks. but, a nice drink periodically as we come out of dormancy, ain't all bad.

I water periodically though winter. Some are in dry rooms in small pots that need watering frequently. Other in my NJ home in cooler conditions, larger pots and less light still get watered every two or three weeks through the colder months. Water in the early morning of a very sunny warm day....this lets any excess water evaporate off leaves.

It's been 80 deg. here so I'm watering them. I hope I'm right to do so. Last time was a couple weeks ago. The soilmix was dry. We have new leaves, spring flowers outside...the Sans are slower so hard to tell for me when they have awakened. Even my Plumeria are sprouting new leaves already. It's been a really warm February.