June 2018
@sunnyday42, no one can answer if it will be worth it to you if you buy it because we don't know what your preferences are. It is definitely worth it to me! But then again I love weather, so it is a must have in my book!
Aside from weather and new clothing, there are customizable holidays that you add to a calendar. There is also a new Flower arranging skill. There is a new scouting activity for children and teens. You can now both ice skate and roller skate. You can decorate your house on the outside (eaves, fences, foundations, etc.) either for each holiday, or for everyday. There are a bunch of new fruits, veggies, and flowers to garden with. There are bee hives that you can harvest honey from. There are more features, but this is what I can remember for now.
You can always check out the Developers' Livestream to find out more and see how everything looks! You can also find a "Let's Play" of the pack on YouTube. And as always you are free to ask questions!
Happy Simming!