Rates a day of skiing or snowboarding from the weather up the mountain. Search for the resort itself, not the town below, so the forecast is for the right height. GoDay finds the best 4 hours of each day.
A storm holds the score at 2. Above 8°C (46°F) the snow goes soft and the score is held at 3, and above 15°C (59°F) at 1. Gusts over 90 km/h (56 mph) hold it at 3, rain on the snow at 4, and a whiteout (visibility under 1 km) at 5.
Daylight counts too: at dusk the score is held at 3, and once it's dark at 1.
It knows how much new snow fell in the last 24 hours, not the base depth. Forecast models are poor at snow depth, so check the resort's snow report for the base and which lifts are open.
GoDay rates -12 to -2°C (10 to 28°F) as ideal: cold enough to keep the snow firm without being bitter. Above 4°C (39°F) the snow turns to slush.
It varies by lift and resort. GoDay treats gusts over 50 km/h (31 mph) as a sign lifts may go on hold, and gusts over 70 km/h (43 mph) as likely closures.