Joao: There isn’t really weather in space. At least not the way we are used to it, here on Earth. There is no wind, no clouds, no rain.
But there is plenty of Sun. Being directly exposed to it, temperatures get pretty hot. And when you are behind the Earth, in shadow, it gets really cold. Luckly, on the ISS, we can control the temperature. And usually we keep it about “t-shirt temperature”.
In space, it’s pretty cold! Unless you’re in line of sight with the Sun or another hot star, it’s minus a few hundred degrees and not really any weather because that only happens underneath an atmosphere of a planet.
On ISS the STRATOS team in Europe and the ETHOS team in USA and their counterparts in Russian and Japan keep it to a nice Tshirt temperature exactly like Joao said: usually from 19oC to 23oC. Astronauts can request if they want it hotter or colder.