https://www.howhotwillitget.com, I made an overview of future climate scenarios of each country worldwide with the latest predictions by the World Bank, maybe this is what you are looking for. :)
This is great work and you are to be commended, but I'm not quite sure what to make of the data... I live in a part of the USA that has been above 100F for the past week and will be again over the next few days (we got a brief respite overnight and today). When I look at the national average of the US in your tool though... it would actually be a slight improvement over my area if those were the averages. As I scanned through a couple countries at random, there were several where I thought "gee, that wouldn't be terrible." So, I don't know if sub-country data is available, but it might make it a bit more real, at least for countries that span large geographic areas.
Thanks for the constructive critic! It's the thing I hear often, the data source works with averages, but I believe I should mail them to get more of an understanding.
Thank you very much! Please consider donating the tip you meant to give to this Dutch environmental organization: "https://milieudefensie.nl/actie/doneer." They are the ones who brought the case against Shell in court, forcing the company to actively reduce its emissions by 2030.
Regarding posting it on Show HN: I attempted it but received no responses; nonetheless, I will try again with a better UI/UX someday, as there can be some improvement for our crowd over here. If anyone is willing to help expand the platform, feel free to message me on Twitter.