Domoticz

I was wondering what would be a good weather station to use with domoticz.

I know that using RF 433MHz Receiver modules you can intercept the output from external sensors of weather stations. But is it also possible to connect to the weather station itself to get e.g. the inside temperature.

Most weather stations have an 'inside'-sensor' for temperature, humidity and pressure.
Some have that as part of the console, other as separate, wireless sensor at 433MHz or 868MHz, or as a combination of console & separate sensor.
In the first and latter case the console's USB-interface (or similar) transfers the data to the computer which processes the meteo-info.
To be sure what is applicable, check the specifications.
If 100% wireless readout is preferred, look for a sensor compatible with T34C/RFXCom or with RFLink.

Well, as I said, I understand I can intercept the sensors data through RFXCom or similar.

But if I read your post, then I'm guessing to get the values of the console itself I will need a console that connects to a pc via USB?

OR are there stations that allow to readout the console via wireless (zwave, rfxcom or wifi)?

For simplicity I suggest a Wifi model that can be connected to Weather Underground. Then just set the station ID in the Domoticz WU plugin.

Personally I just get the weather from other WU stations in my area, there is one about 300m from me and it saves me the cost of having to maintain / replace my own system.

'PC' can also be a Raspberry or comparable processor.
E.g. the console of PWS type TFA_Nexus has an USB-interface and you can connect it and read-out with Domoticz-on-Raspberry: use TE923 as setting under Hardware. TE923 is a generally applied USB-interfaceformat for many PWSes.