To monitor the temperature (or anything else for that matter) you need to make some kind of connection. It doesn't have to be SSH or VNC, though they would allow temperature monitoring. Another way is to run a web server on the pi. A small light-weight one is called lighttpd. Alternatively, you can use apache2. In that case, you would construct the web server to send a page with the temperature data on it to your browser.
Hope that helps.