That's exactly why I got my weather station. We can have clear skies and calm winds up here where I live, while 10 miles down the road in town it will be raining cats-and-dogs. I got tired of hearing that my house just lived through an apocalypse to come home and find out that it was a perfectly nice (if hot) day.
In my 20 years in AZ, I've learned one thing: when the forecast calls for 10% chance of rain, it isn't that everyone has a 10% chance of getting some rain, it means that somewhere in the metro area 10% of the city will have a 100% chance of rain, while everyone else will have a 0% chance.