While you can always check the Snowdon Weather forecasts before setting out, we also recommend having a look at the nearby Snowdonia Webcams. Especially in winter as it’s currently the only reliable way to see the snowline. There are some reports of the snow conditions on the Met Office mountain forecast, but they can be vague.
The best view of Snowdon going!
The Ogwen Valley webcam run by Ogwen Valley Mountain Rescue Team.