Living in one of the hardest areas to forecast the weather and the local news stations have eight-ten day forecasts! You usually don't know what the weather will be like until the day before and it still could end up being something different the day of.
Also when the weather forecasters in my area seem to lie about the weather. Trust me I feel it happens often. If there ever is a special event going on in Hampton Roads especially VA Beach, the local weather forecasters try to say it is sunny up until the last minute. Which is usually the day of. I might be wrong about this, but I think it happens.