Accuweather - 25 day forecast
Accuweather used to have a 15 day forecast and now it goes out to 25 days. It may not be very accurate out that far but it's interesting to look.
We haven't had a late frost here yet this spring but there's a couple night's that are supposed to get down into the upper thirties according to their forecast which is a bit lower than when I checked it a couple days ago so that worries me. Everything is so far along here. It would be awful to get a frost/freeze now.
This is the forecast for me. Put in your zip code or city and state in the blank to see yours.
Here is a link that might be useful: 25 day forecast on Accuweather.com