This is the fastest way I know of, too. Just enter the name of your town, hit return, and the next page will have the latitude and longitude....as well as, the weather and 7-day forecast.Windy in Kansas said:As anniew stated about her weather site the one I use gives it also.
http://www.wunderground.com When there enter your hometown and the latitude and longitude will be toward the top right.
You may use city, state or simply fill the search box with your zip code. Search box toward top left.