The colder the better.
It's actually not just cold, the wet-bulb (combination of temp and humidity) needs to be below about 28*. Generally, this can happen with a temp under 28, but sometimes it can be higher and sometimes it needs to be lower, it depends on the humidity. On top of being cold for the actual snowmaking, it needs to remain cold after, or else it's just kinda a waste. That being said, the 10 day doesn't seem too promising...but if the trend continues after the 19th there might be a good shot after Thanksgiving weekend, especially if this warm spurt is our Indian Summer, cause if so, we got off very lucky. Luckily, because everything is ready to go and our snowmakers are fucking awesome, we really only need about 72 hours of solid snowmaking to be open. Keep those fingers crossed.