!rant more advice needed for weather API

I am making a spur of the moment travel app built around a weather API. The problem is I need to feed in temperature and humidity for a date and get a list of countries and all the APIs I'm looking at work on location requests.

So, I plan to solve this using a JavaScript webworker and set intervals to build my own database that I can query.

Would it be better to use a script external to my API or keep the business logic internal?

Best answer receives my warm thanks.

P.S. @dfox there should be a non rant section?

Please let me know how you make out with this project. I have great interest in weather alerts and non-weather alerts for crisis management and business continuity.
Can you say what benefits the system will provide?

Good luck!

@Jumpshot44 it is aimed at travel on the spur of the moment. For that reason I'm just using a free weather api that returns the next 5 days worth of weather results. If it goes well maybe I'll upgrade it to 12 days of results.

But basically all it will do is ask you for a temperature range you will want for your holiday, a humidity range you will want and return a list of countries that have this on the day you want to go.

After this it will use some other API to help book a cheap flight.

So I'm not sure it's your thing but it turns the traditional search on location for weather on its head and searches for location by weather instead.

Very interesting what you are doing. If I find sources or ideas I will let you know. @dfox may also have ideas for you.

I have a good wind velocity site I used during hurricane Matthew that proved valuable. Not sure if they have an API. Does wind interest you?

@Jumpshot44 Thanks, but for now temperature and humidity are all I want to achieve as I only have 6 weeks to do it all.

@Jumpshot44 small update

Build is almost finished.

I've had to scale the project down to capital city to capital city for my hand in but later I will expand it and get it up as a real service.

It should be finished and up in the next few weeks. The search for capital cities with a weather in a range within the next 10 days is fully functional and I have a web worker updating the forecasts every 5 days.

If you're still interested In the alpha product I'll post a little update.