Weather from About.com
Trust About's Weather guide to provide the info you need to plan that upcoming trip.
Weatherbase Vacation Weather Forecasts
Select the month of your getaway, choose the hottest and coolest temperatures you like, and this site suggests destinations that suit your criteria.
National Weather Service
Your tax dollars are at work at this weather megasource. You'll have to drill down a bit to find weather forcast information.
Old Farmer's Almanac Weather Forecasts
U.S. weather forecasts of the current month and the next. Not always reliable.
Weather Channel Weather Forecasts
Provides current weather readings for U.S. and international cities as well as airport and flight information.
Professional weather forecasting services.