I am not sure if the same exists in the US, but the info I get from wunderground, cnn, weather.com etc. here varies. One will say rain, another, no info an other sunshine, temps also vary. I don't know where they get their information from, as it is not consistent. I have learned to use the government site, they have a local information gathering site and update frequently.
Bretski, you might try building you own station, there is a ton of equipment currently available, my wife did some "predicting" when we lived in California and got fairly good at it. Like bird watching you will find lots of information resources available to you.
