Hi Melissa,
Welcome to the forum. I'm so sorry your young child has been diagnosed with Lupus. 10 years old. My goodness. How is she doing? How are you all doing? Please visit us and learn more about this disease. We have a wonderful bunch of members here, and we'd love for you and your daughter to join us.
As for your question. I would recommend the Washington State, Oregon. They're quite cloudy most of the time. I live in Calgary, Alberta, Canada which is very close to Washington. We get the Seattle local news so we're in tip top shape when it comes to knowing Seattle's weather forecast! It's a beautiful region of your country, that's for sure! And you have the ocean, which is something that is already so familiar for you.
You are amazing parents to think that intently about your daughter's well-being. To make a move like that is a big deal. She'll do so much better in a cloudier, cooler environment. The heat itself is hard on people with Lupus too. We have to treat the sun like we are allergic to it. Those UV rays are very harmful. So are fluorescent lights. They're like poison. If you have them in your home, switch them back to the old incandescents. I'm stock piling my supply before we can't buy them anymore.
It will be interesting to see what the other members suggest! Good luck. God bless,
Ginny