I use www.weather.com and www.intellicast.com. What do you use?
I like a site that can give me current conditions, a quick forecast, as well as historical data (so I can look up a workout for which I don’t have data and find what the temp was when I did that run, or what the wind speed was when I did that ride).
These two sites are o.k. for that, but if you use something better I’d like to know about it.