I really like Weather Underground for weather data. They’ve been around forever (they still offer their telnet version!), and do lots of cool things.
I pay $5/yr for a subscription (someone mentioned to me that new subscriptions are $10/yr) and it essentially just takes out all the ads.
They’ve given me an auth code to allow people to get 1 free year, so if you’re interested, let me know. You can email me directly, or simply comment here using your real email address in the email field (it doesn’t get posted anywhere).